Theres 2 manufactures to consider when looking at quality in tents, HomeBox and Secret Jardin, HomeBox were the original tent developers, there old range of silver mylar tents was solid, they now have a kick ass range of tents called GrowLab, i run a 1.5m x 1.5m x 2m tent of this, it has viewing windows so you dont even have to open your tent to see your crop, the tent material is high quality along with the zippers being good quality, the only downfall i found with GrowLab is the stitching in some spots ( due to high volume manufacturing ) is rather ordinary, overall i rate HomeBox GrowLab an 8 outta 10.
Secret Jardin tents are by far the most superior in quality along side all those on the market, there not cheap but like another member stated if you want something that will last and you can take with you wherever yo go, Secret Jardin is the way to go, i also run a 2.4m 1.2m x 2m flower tent of this brand. 9/10 worth every cent.