Got a 4500, love it... Of course I have to since my first bike is a wal-mart one. Anyway, the brake pads don't stop too well, and I'm too cheap to change them. The tires wear out very fast, the LBS repalced them for $15 for some Bontrager Connection Trail for the back. Plus they wash out on the slightest turn on tiny gravel. Dart 1 Fork isn't all that great, but it's a starter. Everything else is fine, the pedals are all metal and don't break.