5 out of 5 for its price. The only negative is the range (at 20-something meters it is lost) but that's okay.
All good!

Incredibly nice and cheap. I use it for many hours to connect my PS3 controller wirelessly to the computer. I haven't encountered any issues

Range 5-10 meters. Easy connection and setup. I am not very satisfied with the sound quality when I connect wireless headphones. With the same headphones, I have much better sound when I connect them to another Bluetooth device, e.g. a laptop.

Windows 10 - Tested.
Windows 11 - Tested.
Even in a virtual Linux environment.
3 different headsets, tested from Sennheiser to JBL, lose range exactly at the same point, barely reaching a range of 3 meters.
It's a room space, and everything I need is around me, so if I get up from the computer and listen to a podcast/meeting, etc., it loses range at around 3 meters.
Without any interference from wifi or anything else, not even a wired/wireless mouse or phone.
Unacceptable for its range.
3 stars and that's because it was "relatively cheap" and it works when I'm sitting in front of the computer, but nothing more.
Don't get it if you want range, you won't have it.

Tried for:
-Headset
-PS4 controllers
-Earplugs

Range also very satisfactory.
Flawless for its price.

For the type of antenna, very good range, around 5 meters with a wall in between, 10 without obstacles, no interruptions in the connection. Very good

For front connection use on a computer that I need to connect wireless headphones, it does its job perfectly fine, it doesn't have a very long range but it is good and fast in connection!

I used it on Linux. It is the "ID 0bda:8771 Realtek Semiconductor Corp. Bluetooth Radio" with the "RTL8761B" chip. It worked straight away on a recent kernel, given that drivers have been included since last summer. So, on an updated Linux machine with a modern distribution, nothing else is needed for it to work.
It easily connected to wireless headphones and works perfectly without any disconnections.
The range seems good because when I went to adjacent rooms with the headphones, there were no interruptions in the sound. Personally, I don't think I'll need anything more than that.

Honest product for its price, but it doesn't fulfill the purpose for which it was purchased, which was to improve the range through Bluetooth 5.0 compared to the 4.0 I had. It improved it slightly, but as soon as even a thin wall interferes, it's over. What was solved was the coexistence of headphones and a Bluetooth mouse.
The strange thing is that my 7-year-old phone has infinitely better range.

Plug and play on Windows 10 - 21H1 and compatible with Fast Pairing devices (e.g. Bluetooth keyboards or mice). The device just needs to be connected to the internet to download the necessary drivers. Its range is good for BT 5.0.

A very good purchase in terms of price-performance ratio.

Very good. And cheap. It connects relatively quickly. Forget about transferring large files..... It's not the machine's fault but rather the Bluetooth technology that has fallen far behind. Bluetooth is not meant for transferring large files, but rather for connecting multiple devices together.