Instruct: Classify Amazon reviews into positive or negative sentiment
Query: be careful which seller you buy from

I bought from lusopc and they sent an entirely different adapter from the picture. It rattled and my car player just spits it out. Mind you, I already had an adapter before this that worked perfectly in my car (until I accidently broke it myself). I tried this new one in my home stereo and it worked, sort of... It made this loud grinding sound and the song quality was extremely muffled and had a lot of static. I emailed them about it being defective and they now informed me that they are not "compatible with all systems." A cassette adapter not compatible with all cassette players? How? Why wasn't this in the item's description? They sent me another one and same exact thing. With shipping costs you'd probably be better off just looking for one of these on sale at some local store.