It's a giant room of trampolines. What more could you want? Our kids loved it, my oldest son liked the walls being trampolines the most, and spent the majority of the time seeing how high and far he could run along the walls.
My youngest really loved the fact that there is a separate area for small children/toddlers. Not having to worry about big kids knocking you on your butt the whole time was great for him. That area was practically empty too, so when his big brother joined him, they had the place to themselves and had lots of fun together.
Only downside is there wasn't really a good place to watch your kids. All the tables were occupied with birthday party rentals, so we could only really stand on the far end to watch. Looking at pictures, they may have added an upper level for seating (we went about 8 months ago).
Additional benefits: cheap snacks and drinks at a little snack stand, and a decent assortment of arcade games. There are also party rooms in addition to the party tables.