Yeah I have a sheet of flexwatt on the left side of each controlled by a Herpstat Pro. I didn't even know about Neodesha's Cages until I was reading on Grahams(StrangeCargo) forum. I went with NPI because of the size and the price. I have a couple Zilla 40's and it was getting a little crowded. I found these are about the exact same size(36" X 19" X 12.5"), except for the height. And you can stack them atleast 4 high. The price for 3 of them is $509.85. Considerably cheaper than Vision for about the same size. There made out of ABS plastic I believe. Very light but durable. Dual vents, that are double or triple layered. Dual sliding glass doors. The pic from the side you can see the light. They come with a large molded are that fits a 24" fluorescent light strip. Only downfall is where the sliding glass meets the is a small crack, so I put some window/door striping there and it seems to be good. So far I am very pleased with them, and the company. Took them about a week to build. And 3 days to get here.