I have a 2006 3.5L V6 and love it. It was a program car prior to my acquiring it.
I've had it since Oct. 2007 and only this year had a few things that needed replaced--the only serious problem being tiny pieces that slide back and forth in the brake mechanism (not sure what the technical term is) were defective. I have no idea if it's a problem limited to '06 models, just mine or what, but it might be worth asking about. Even with the extended warranty, it was still a few hundred dollars to fix.
If you're just looking at it as a family car to get you from point A to B, I think it's a great car and have gotten many compliments on mine. My mom, who has a 2009 Challenger even likes it. I don't know anything about it's performance aspects, but I know it works perfectly for my needs. It's roomy, comfortable and easy to get in and out of.