I have over 10K miles on my Nitro. It has been into service twice because parking brake doesn't hold. Returned to me without fix, service tech said it is "self adjusting" and would self adjust if I came to full stop when in reverse and before shifting into drive. Have been doing this but no resolution to problem. Also, when reversing from parked mode it will freeze not reverse until I punch the gas pedal (safe, eh?). Service tech said because brake pads (disks?) stick together when I apply parking brake after driving due to hot metal and told me not to use the parking brake if I don't like the phenomenon. WHAT! Owner's manual says to always use parking brake! Final note: gas mileage sucks.
Body appearance, handling. Great acceleration when needed.
Improve MPG, get rid of well in back cargo space and put a thicker "carpet" back there, it is hard like the bed of a pick up truck.