I bought this for my old Cadillac that only had a tape deck and it was amazing (with a Bluetooth cassette). I haven't used it since I got rid of that old Cadillac about two years ago now. Pretty limited use case but it still sucks to kill shit for no reason.
The sound is honestly not bad, better and less hassle than an FM transmitter. There are 3.5 mm ones too that work pretty well but I had a few of them and they fail where the cable meets the cassette. I passed it on to a friend with a whole house cassette system when I got my new Cadillac