Really very good flashlight in terms of size, weight, and performance. It is more than worth its money, even on high it makes a very good light beam, and on turbo the 3000 lumens for its size is truly impressive!!!

EDIT: In the end, to have it on your keys, I think that in terms of size it is marginally okay. As for weight on the keychain (although it is generally not a heavy flashlight), it might feel a bit heavy for some.
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I haven't had it for many days, but it really seems very good.
In terms of construction, it is very sturdy with a beautiful design.
Having communicated via email with Fitorch about the differences between the P25GT and the P25 (the P25 is the older model), the only significant difference is that the P25GT charges with type-C directly from the flashlight's external port (whereas the P25 does not have a charging port on the flashlight itself, but on the battery. That is, you remove the battery and connect it to a USB port to charge it).
Apart from that, the P25GT is slightly shorter than the P25 (and I think also a little thicker).
Also, the P25GT has the ability to enter sleep mode by slightly twisting its cap (as if you were going to open it to remove the battery, but you only twist it a little), meaning it doesn't turn on, it's like being disconnected. This is very useful when you have the flashlight in your bag or pocket so it doesn't turn on by itself and drain the battery.
It has regular strobe and SOS signals just like the P25.
In general, I see no reason (both from my perspective and from what I've inferred from the email correspondence with Fitorch) for someone to choose the P25 (a 6-year-old model), while the P25GT is a 3-year-old model.
You will likely see many more reviews and unboxings on YouTube for the P25, as it has been on the market for 3 years longer than its advanced model, the P25GT. The same goes for reviews on Skroutz (the P25 obviously has more reviews for the same reason). Practically, in terms of lighting and quality, from all the reviews I've seen, the two flashlights are almost identical. For me, the fact that it charges with type-C directly from the flashlight (and you don't have to remove the battery, etc.) is a decisive factor in choosing it compared to its predecessor (always considering that in all other aspects, as I mentioned, they are roughly the same).

Time will tell its durability; personally, I got it for my keychain. However, if you want to do the same, know that while it is short and its height is close to that of typical keychain flashlights, it is quite chunky. This is because it has a 2000mAh battery, if I remember correctly, while the "ideal" keychain flashlights that are slim might have a 300-500mAh battery. Also, it is not particularly heavy.
However, it is very compact and practically a FLASHLIGHT compared to other keychain flashlights, which usually have brightness levels of 200-300 lumens that last 15-20 minutes. This one is a regular flashlight that at 700 lumens brightness lasts 1.5 hours.

The type-C port also has a very convenient and comfortable cover, which is important too!

Finally, I want to reiterate that this particular flashlight, the P25GT (and I would say the P25 as well), is the closest you can get to a FLASHLIGHT in such a size, with such lumen power and with the respectable autonomy it has, compared to flashlights for keys or small pockets.

I should also mention that both the P25 and this specific P25GT can take an extension for a larger 26650 battery, meaning a larger cap that increases the overall height of the flashlight.
The p25 for extension needs the product et25 while the p25gt needs the product et25gt. These two products look almost identical in the photos, but they are not. They have a slight difference in size. So get the right one! As for which battery to get for extension, I am not an expert in general. However, Fitorch itself, in photos on its website and elsewhere, advertises the extension of these two lenses with the Fitorch 26650 4500mAh battery.

Sorry for the lengthy message, I just wrote it down as I thought of it and it came to me, and I might be repeating myself somewhere.

Powerful flashlight, small in size and weighing just 75 grams, with waterproof and drop resistance certification. It has five lighting levels plus strobe, sos, and beacon functions. It features a locking mechanism to prevent accidental activation, as well as a battery charging indicator light. When turning on the flashlight, it automatically lights up at the intensity stored in memory, and if you want to change it, simply press the button until the desired intensity is reached.
In turbo mode (3000lm), the flashlight can operate for a total of 15 minutes but continuously for about 1 minute, then automatically drops to the immediately lower level, which is also quite powerful at 700lm and can operate for 90 minutes.
It is a flashlight capable of illuminating with a uniform beam of light over a wide range and at a great distance, and you can always have it with you without being bothered by its size and weight.