Eh for that price, you can snag the awesome Hangar 18 backdrops. These are also very small, 15x30 may sound big but in practice it only works for smaller stuff.
For $20 or less, you can pick up these super awesome backgrounds and either cut them down to size for your specific lightbox, or keep them whole for full army shots. They are big enough to do both really, super durable, great for pictures (obviously) and dont require special lighting. Plus they come in all the
40k ish colors you could want.
https://www.amazon.com/gp/product/B01K1A22EK/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
Im not trying to hate all over this kickstarter, I just dont see any advantage over taking this product vs what is already on the market.