My wife was against getting a trampoline because a nurse told her all the horror stories of kids hitting each other and ending up in the emergency room. I grew up in the 70s with a trampoline (and with no nets or padding of course!) so I wanted to give my children the chance. I found that with the round ones kids end up going to the center when jumping and that is where most of the accidents happen. With the rectangular one the bounce is even accept around the edges so there is more surface area for two kids to pay together. The size is great for 2 kids. Set up was easy and took about 3 hours for me to do myself. Highly recommend.