Oh wow, this place is truly the go-to spot for relaxation.  I didn't partake in any of the restaurant or spa services, but I stayed here for two nights back in late May (when the average highs in Scottsdale were around 100) and I felt like it was the perfect time of year to be here.  The resort and hotel weren't overly crowded but it was a bit hard to find a quiet spot by the pool.  There are two pools by the way, one catered to families (kids) and the other for adults (mostly middle aged folks and up).  Our room was on the eighth floor and faced a really cool common patio area with fire pits and private golf course.  Hit up priceline to try to get a good deal on the Westin Kierland Resort.  It's also right across the street from the Kierland Commons shopping area.  Highly recommended!  DO IT!