We got an AP T8 recently. My husband put it together and set it up, with no problems. We've got it set up with Heat tape for UTH for the warm side, and will probably add radiant heat for ambient, although the PVC is insulating well enough that it hasn't seemed necessary so far. We elected to save a little money and do lights and heating ourselves. We've also got a custom enclosure for my son's skink-to-be in their order queue, and plan on eventually switching from glass to AP cages for all our snakes.
When I talked to the AP people at Tinley park, they recommended the sliding glass doors, as more scratch-resistant. If you get the door locks I would think either style door would be equally secure. If you have questions, do call AP, Ali is super-nice!
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