The boys loved it. For an hour and a half, they ran, they climbed (the structure had at least four levels), they laughed, they yelled, they ran and climbed some more, they even colored (they had tables with crayons and paper out), they had a great time. We ran, we laughed, we climbed (okay only Steve climbed for one rescue mission) and we had a great time. At the end, we were ALL worn out.
Afterwards, we ate lunch and promptly put them down for a nap. Then they ran, they climbed, they laughed, they yelled, and they ran and climbed some more (thankfully no coloring happened considering). Yes, no napping. We tried for over an hour to convince them that they needed to sleep. They would get quiet and then it started all over.
Needless to say, we got nothing done around the house (aside from more exercise running up and down the stairs and frazzled nerves). On the flip side, the boys had a fun morning. One out of two ain't bad I guess.