This is a GREAT product. My children always want to jump on the trampoline in the middle of the day, but it is always too hot for them to play on in the summer. Now that I have these shade sails, the trampoline stays nice and cool! 
They were easy and fast to put up. I used rope and tied them to a bracket on my house and my fence posts. What really awesome is that if I want shade in a different part of the yard, I just untie the knots on the fence posts and tie them to different posts pivoting off the center bracket on the house. 
It also makes my house look really fun from the road. I'm keeping them up permanently since we are going to spend time under them everyday. The children also think it's really neat because it feels kind of like a club house underneath.