ADCO Aqua-shed has been working for me over 10 years now... Looks like heck, with all the black streaks and MOSS all over it, but no tears and the zippers still work and still 'breaths' just fine... :)
It's parked under trees and I live in WA State, so that's why it has MOSS on it..
I've been saying I was going to get a new one for the last couple of years, but I just keep rolling it up and storing it and bring it out at the end of the season and go another year! :)
Good luck with whatever you get.
Mitch