this isn't the most expensive screen out there, so I understand it may not be as good as some other options, but it really should hold proper tensioning on all four sides. after a month or so (of course, outside of return period) the material started to sag and stopped being tight. I reached out to elite screens several times about the warranty and they simply will not respond. I rigged up some extra springs in the back to help tighten things up, but I really shouldn't have to. I would not buy an elite screen again