It is good for its price, I have been using it for a year and a half and it hasn't had any issues, the only downside is that the sound has a few parasites, very few. Also, don't expect anything special from the microphone because if you want it for that, it's better to look for something else. But overall, it works fine

For its price and for the use I make of it, it is quite good.
If you move it even a little, it disconnects, but I don't care because I always have it plugged into the socket with the USB connected and I don't use its buttons.
The microphone is bad, but I don't use it because I use the speaker of my phone that is attached to the windshield.
It connects directly to the FM and with moderate volume, there is almost no interference. With high volume, the interference is minimal, you can hear it but it is not annoying.
So, in general, if you want to make use of all the features of an FM transmitter, just get another one.

Small, convenient, economical with few interruptions... if it withstands the test of time, then it's worth the little money it asks for