Casitas were great, but pool was way overcrowded on Saturday!
We stayed in a casita and our friends stayed in another casita where the balcony was adjoining. We requested this and the Hilton was able to reserve these rooms for us. The rooms were very spacious. Each family had 2 adults and 2 children (ages 2,4 and 4,8). The casitas are 2-story rooms and the downstairs has a 4 person dining table with a 2 couches as well as 2 bar stools overlooking the sink area. There is a refrigerator and microwave, but no stove or utensils/plates. We felt that the rooms were very spacious and although we stayed in a room the furthest away from the main pool, there were shortcuts to get there within 5 minutes. 
The only negative I have with the hotel was that the pool was overcrowded on Saturday. There seemed to be many guests who came to the pool but weren't staying at the hotel. They can buy a pass to visit the pool. There were certain guests who were playing volleyball while holding their drink in their other hand, and the ball was flying all over the place, knocking into people as they layed on their pool chairs. The pool and lazy river pool were perfect on Sunday and Monday as the number of guests went down. 
Overall, I would rate the hotel about 3.5 or 4 out of 5. The hotel staff were excellent and the rooms were great. The only negative were the other guests on Saturday. I felt like I was at the hard rock pool in Vegas.....and that wasn't the vibe I was going for on a family trip to Phoenix.