Advice on Boaphile plastic cages

[cwheeler]

I'm thinking of getting a few of the 4 section racks from Boaphile, but had a few questions.

Are they difficult to clean based upon the front only opening?
How well does the pre-wired heating work for temperature? Would I need to add another heat source?
How about feeding your leopards with this type of caging system, and pulling back the non eaten feeders?

Thanks in advance!