Morning video walk in Metsovo with snow and the built-in Snow 1 filter active for videos with snow and low light:
https://www.youtube.com/watch?v=e96MZ9wm4dE

Night driving video in Sparta with the PureVideo setting, which is ideal for low-light footage:
https://www.youtube.com/watch?v=YFT0T4eHSvo

The remarkable proposal from Insta360 shows that the company has significantly improved in the field of action cameras and is trying to offer the best of both "worlds" (GoPro Vs DJI), and indeed, it seems to be doing quite well and is now a noteworthy choice, and almost a necessity for night videos. In fact, it pioneers as the first action camera with a dual processor (one regular and one AI).
Let's take a closer look:

Build Quality/Dimensions/Weight/Waterproofing:
Sturdy construction, much more robust than its predecessors, the modular Insta360 One R/RS, and I believe that despite the odd idea to place a folding screen, it is as sturdy as its competitors GoPro and DJI.
Also, its dimensions are noteworthy, as the camera is slightly thicker (front to back, from the screen to the lens) and taller (from the base to the button on top) and the same width compared to the GoPro Hero 12, but it is considerably bulkier than the DJI Osmo Action 3/4.
It is also slightly heavier than the GoPro Hero 12 and significantly heavier than the DJI Osmo Action 3/4.
Insta360 claims it is waterproof up to 10 meters, I personally tested it up to 1.5 meters with caution because they say some pieces have issues with the memory card cover, but I did not detect any problems.

Screen Quality/Battery Life/Battery Charging/Overheating Resistance:
It has 2 screens: A simple small LCD screen in front that exists just to provide some information and the folding touch screen that has slightly average image quality in terms of pixels, good brightness, and excellent response to commands even with wet fingers.
In PureVideo (the 4K@25 setting for purely night videos) the battery lasts around 1 hour and 20 minutes before dropping to 5% and automatically stopping video recording, while the camera gets quite warm but does not shut down.
UPDATE: After the latest update (September), the quality of night videos improved even more, but the camera also heats up more, while the camera's autonomy dropped by 10 minutes, so now it is at 1 hour and 10 minutes of continuous video recording. Also, now the camera consumes a very small percentage of battery (around 1% per day) even when it is off...
In regular video, also in 4K@25, it can shoot continuous videos for 1 hour and 40 minutes, with the camera remaining warm to hot.
In FreeFrame (to later adjust it to 16:9 or 9:16) it records video for 1 hour and 29 minutes before dropping to 5% and automatically stopping video recording, and the camera is just warm.
It features fast charging, and without timing it precisely, the battery seems to go from 5% to 100% in about 30 minutes.
UPDATE: I now also have the AcePro 2, which has a slightly larger battery (by 150mAh), and I can tell you with certainty, because I tested it, that this battery is fully compatible with the AcePro and gives about 5 to 10 minutes (maybe a bit more) additional recording time, depending on the function.

Regarding overheating, in a comparative test between DJI Osmo Action 4, GoPro Hero 12, and Insta360 Ace Pro with the following settings: 4K@50fps, Horizon Leveling at 45 degrees, the screen permanently on at 100% brightness, external temperature between 28 and 32 degrees Celsius, and with the cameras exposed to the sun, the Ace Pro exceeded 22 minutes of continuous recording, leaving the GoPro Hero 12 and DJI Osmo Action 4 significantly behind, which barely managed to record 13 minutes and 9 minutes of video respectively.

Video quality/Night videos/Video duration/Zoom/Horizon range and image distortion:
Insta360 claims that the camera can record video up to 8K@24fps. I haven't tried it, but those who have tested it and studied the pixels said that there isn't much of a dramatic difference compared to 4K, so it's more theoretical than actual 8K.
An important fact is that if you shoot video at 25 frames per second, its particularly remarkable HDR is automatically activated, and the results are very impressive.

In night videos and low-light videos, the Insta360 excels as, thanks to the additional AI processor, it offers better stabilization, less noise, clearer images with more vivid colors, and almost no flicker compared to the DJI Osmo Action 4 (the GoPro, despite improvements, continues to come in third and lagging in low-light videos), at the cost of reduced autonomy, as both processors of the camera operate to achieve this.
The big difference with previous Insta 360 (One R/RS) models is that the AcePro is capable of recording continuous video. One R/RS users know very well that these cameras interrupted recording for a few seconds after 29 minutes of recording and then continued again, resulting in lost footage when the user wanted to record continuous video for many hours (like me in the driving videos I upload to the channel https://www.youtube.com/@TravellerChris).
While in One R/RS the (3X if I remember correctly) zoom is digital, done manually, more smoothly (with a little practice), and the image pixelates quite a bit, in the Ace Pro the zoom is 2X, done automatically, abruptly, and due to AI technology, the loss of detail is negligible.

Regarding the horizon range, in the Horizon Leveling setting, it is at the level of the GoPro, but as we move up to Dewarp, Action, and Ultra, it seems that the GoPro offers a greater horizon range (the DJI Osmo Action 4 offers the greatest horizon range without the addition of any accessory), but the image distortion is significantly less in the Insta360 AcePro.

Photos/Other features:
The 48MP photos it takes are particularly remarkable, clear, and with beautiful colors, while it has HDR photo functions, Interval, Burst, and video functions like Slow Motion, Loop Recording, Timelapse, and TimeShift. In Starlapse, it simultaneously takes HDR photos and video, offering much greater creative freedom, while having much less noise and a brighter image compared to the corresponding function of the GoPro Hero 12.

Mobile app/PC and Mac program:
The mobile app is fast, reliable, offers many video editing options, as well as short tutorials, and also unlocks the ability to edit video via AI, but up to 1080p. Also, it is necessary to activate the camera for the first time. The connection is very good, stable, and allows live view of the content at any time. The application for PC and Mac is more basic, but it allows color editing, digital de-noise, video modifications (speed up/slow down and add motion blur).

Package Contents:
The package includes the camera (obviously), a plastic quick-release adapter with a strong magnet and 4 hooks, a single-use adhesive mount (meaning it can stick once to a smooth surface, but will remain "permanently" at that point), a USB-C to USB-C cable, two sticker cards, and the printed manuals.

Negatives:
1) The fact that the lens protector is integrated (glued) onto the camera's chassis, so removing it means automatic loss of warranty.
2) The MicroSD is located under the USB-C port door and not next to the battery, as is customary with DJI, which means that in the event of operating the camera via cable power, the MicroSD and, by extension, the entire camera are exposed to moisture and weather conditions. Of course, this might be one of the reasons the camera takes longer to overheat, because the battery and MicroSD card generate the most heat inside the camera.
3) The obsession of the Chinese with magnets... Yes, the plastic quick-release adapters are quite strong, but I don't feel completely safe when I have the camera mounted outside the car and driving at 80km/h or 90km/h, while the camera has no protrusion for tethering with a rope. The only real solution is the very expensive metal multi-adapter from Insta360 with the locking mechanism, which is hard to find in Greece and very expensive on the Insta360 site.
4) Its price, which is quite high compared to the competition. Based on current prices, it is about €70 more expensive than the Standard versions of DJI and GoPro.

If you want more information (and videos) about the Insta360 AcePro you can find them on my channel:
https://www.youtube.com/@TravellerChris