I like it,saying that I haven't used it yet but it feels heavy enough.I think I asked a question on here once about what kind of material was used and 18oz VCP was one of the answers.I bought some samples from www.seattlefabrics.com and I liked the 18oz but its $14.99 a yd without shipping from them..I got some pics of it on "my old Grandby build" post.If you attempt to build one yourself,my advice is to pin the screen where you want it then sew it over the VCP sew your clear window,velcro sides and top and what ever you wanted on the outside then cut the window,I think that would help with the puckering when you put it back on,and make it a few inches longer than you need it so with the roof up you can pull the material tight and tack it so when you put the trim on the bottom just cut whats hanging below the trim strip…I didn't do that ,my old liner was 26" and thats what i made the new one,1" along the roof and 1" around the bottom,no room for mistakes and not enough to pull down on so my liner is a little loose.