I felching HATE IT. I had a matrix before this car that had a crappy Delphi GM radio in it and it had more ball$ that this unit does. Maybe it is just the speakers, but I have not been happy with it. I bought my tc on saturday. I know about changing the profiles of it, but that doesnt help, it helps some, but not enough.
I hate to say it, but I think r2tc is either on crack or hasn't messed with the settings enough. The factory HU is very powerful and produces pretty darn good sound. I stuck with it for 7 months before replacing it, and it wasn't really necessary when I did so.