I just created these two enclosures this week after buying the two cages at a going out of business sale at a local petco. The one on the left is for my juvie GBB and she's already webbing up the upper right corner (and a little bit under the cave as well). it's a 10 x 10 x 12 high, and like I said she's still young.. The one on the right has nothing in it right now, since my arboreals are too tiny, and the rest are terrestrials.
She definitely shows signs of wanting to web high, though... Will need to take new photos, since this was immediately after I plopped her in there just to see how she took to it, lol.
They're nice, VERY light enclosures, but I do not recommend them for something other than an arboreal, really, and for something that's OK with 12" height. I do wish they opened in front instead of on the top, but for $10 dollars each (ON SALE for 60% off, that is, what with the going out of business sale) it was a good deal. I'd have bought more if they had more than two available.
The background was made using foam (that pink foam they sell at home depot), silicone, and a craft cement, and acrylic paint mixed in. Extra water added and multiple coats were put on it. I used sandpaper to add texture to some of it, and dry brushed lighter and lighter for the added effect...
This was actually my first attempt at doing a background like this, so I'm pleased with the results. It's smoother feeling than it looks, too.
This thread prompted me into taking a few pix, so I thought I'd show my GBB enclosure.