I really like this module and use it as my "return" when I connect pedals to my eurorack. I've had a few send/return modules but now prefer to keep the send and return processes separate.
Unless you change the external source regularly, this is kinda a set-and-forget module and I prefer those to be small, which this is. All you have to do is connect your cables and set the gain. There is an level/peak/overload LED which is useful.
Sound wise, I don't hear any distortion or artefacts. It's not a sexy module but it does the job expected perfectly well. I have two of them.