Pioneer KEH-P5800 Car Cassette Player

I bought this unit, and when I first wired it in, it didn't work. After thinking it was wired wrong, I decided to send it back and it ended being the face plate was broken inside somewhere, but after that it was great. It is a very good sounding head unit with a lot of great features and goes great with a Pioneer cd changer like the CDX-P650 which I also reviewed. Recently the button which you push to change the bass and treble settings and balances and such has become stuck, but that's probably because I change my settings quite a few times every day. So it's going to be sent back in for service, so it has had quite a few problems, but I blame the second one on me and I probably just got a bum unit because I have never had a problem with any pioneer products.