Watch out for Resort Fee increase!
First off, I'll start by saying that this was our sixth visit to Arizona Grand Resort (going back to the days of Pointe South Mountain Resort) and we really enjoy the place. We try and take our boys once a year and they absolutely love the waterpark. My husband and I like the resort and the Phoenix weather. This trip was also great - we had requested a hospitality suite (for a second bathroom) and that wasn't available, so they upgraded us to a one bedroom villa suite for a nominal upgrade fee. The suite was large, clean, luxurious and very close to the water park. Overall our stay was great, with very good service and meals.
Our only complaint was the increase in the resort fee. When we booked (about a month ago), our reservation referenced a $30 resort fee, which we had paid on previous visits. However, when we checked out, our bill included a $40 per night resort fee. When I inquired, I was told that the fee had recently increased (to include wi-fi internet they said). This wasn't mentioned when we checked in (although I'll assume it was on the paperwork I initialed when checking in). In response to pointing out that our reservation quoted the $30 per night resort fee, we were told that the fine print on the reservation gave them the ability to change the fee any time they wished. 
This was a huge let down after our great stay. Based on the considerable amount we had spent at the resort, the $10 increase was insignificant, but a slap in the face. 
We'll probably end up going back next year, but right now I feel that the $40 per night resort fee is out of control and the manner in which it was increased was not up to the standards we have come to expect from this resort.