I bought my 2006 RRS in June or july of 2005.

 

I've had mine since Oct '05. Only some minor gripes to be fixed on the first service. Sunroof plays up on auto close, auto reverse mirrors sometimes stay in reverse mode, the upper half of my tailgate needs adjustment as it is slightly loose and using a the spacing adjustment the tighten it causes an air gap you can hear road noise through. My tailgate also lost strut gas pressure last weekend for some reason, a bit premature I'd say.

As for performance if you want boost the RRS, buy a chip and pulley upgrade to take it to 443hp and approx 490ftlbs of torque. If you want more buy a Porsche Cayenne. I got out of an 05 Grand Cherokee for it and really appreciate the way it drives and its features.

 

I've heard of some very nasty experiances with the 06 Sport. It may be a few issues out of thousands but I have heard some real horror stories.