I agree about the glass enclosures, they are adequate for hatchlings, but a large adult would not do well in a glass enclosure, in england, the problem is, we only have the exo terra flexariums in 3 sizes, they did do a massive 6 ft one which I have, but they discontinued it. the exo terra screen ones that you can get in the USA are not available in england.
There are some alluminium cages by a guy called terry thatcher available, which are BRILLIANT but they are quite expensive and only available through a website so most keepers dont happen upon them. Zoo med has just brought out screen enclosures l;ike the american exo terra ones but they have only released the small ones as of the present time. Hopefully they will release the rest of the sizes soon, because for new keeprs on the UK there is not alot of choice, and the pet shops really only sell glass ones. The exo terra fleaxariums are not durable for the price, I totally agree, I have had to get the sewing kit out many times to repair the zip! the flexi trays are hard to find in the right sizes aswel without ordering straight from the wholesaler which most people cant do.
We need more practical enclosures in england!!!!!