I have a growlab gl145 I think. It's the 5 x 5 one. I'd say it was worth the money as far as being sturdy. But it wasn't completely light proof. Although I am running a 8 lamp T5 2' away, and a 600 watt MH 5' away. The zippers are super smooth and I didn't have any problems with putting it up. But the zippers were where the light was coming in. And a couple small pinholes in the stitching. I had some leftover panda film, so I bought some Velcro and made a big removable cover. It was a little extra cost, but I'm still happy with it.