We were so excited to get this cover.  I have a 15' trampoline with angled poles so it met all the marks as far as the trampoline.  Now we got it in and there is webbing in the middle to let water out.  The top never stays tight so your head is hitting it constantly.  Then when it rains they water pools in the cover and ends up a huge pool of water that we have to go in and empty because it does not go out.  Huge fail for us which is a shame because if it had poles to give it some tautness it would be awesome.