For small AFV's in 1/35th scale, the 43cm size is large enough. Anything larger, and you start to see the edges in the photos. if you are photographing 1/48 scale (gasp) aircraft, and I do, then the tent is way to small.
Below are a few photos taken using the tent:
I am asking my local Hobby Shops so get in the Tamiya photo both. It's much larger and can fit a 1/48th scale jet fighter with ease. It doesn't have the lights and tripod like the one you listed has, but I prefer to carefully chose my tripods and lights seperately from the tent.
http://www.hlj.com/product/TAM74079
I currently use two pieces of foam core for my background, an Ottlight and a Veblon 30" tripod.
Hope this helps.
Val