The kids love it! It works great in the house or in the gym with a smooth surface. It will work on concrete, but not as well. It glides really fast on the tile floors so it's much more fun than outside. The gates are just that. They are not big goals like the pictures makes it look like, but if you've every played air hockey on a table, it's similar. You gotta be pretty good to hit one of these gates. The main thing is that the kids love it and it's great exercise chasing after it.