These go up so quick but dont be fooled by the 30 second bit the block shape of these things can turn them into a sail and a structural meltdown .Set up right they are ok.good quality canvas zips and alu frame.Big weakness is the lack of a second skin with an air pocket so they heat up fast real fast.Another negative is the bag its long and made of a sub standard material especially the straps which totally disintegrate.Oz tent deny there is a problem with the bags but do say they have changed the fabric,i doubt they have .A bit of a let down considering the price