I don't have a rack from boaphile, but I do have a few cages, which I love. I don't use them for ball pythons though.
I keep all my adults in 41qt tubs which is a TON of space for even my biggest female. Ball pythons are very shy animals and in nature, they will seek out a cramped termite mound or a rodent burrow and spend most of their time in this place because that is where they feel safe. If they feel safe, they are less likely to go off feed. So while a nice big enclosure might seem like you are doing the snake a favor, it might actually be upsetting for them to have all this empty space. You have some options. You can clutter up the big cage with pieces of wood, fake plants, etc etc. Or you can get a smaller enclosure with a simpler setup. Most people choose the latter simply because a smaller enclosure takes up less space, and is easier to clean. Especially when you don't have to disinfect a huge cage and all the accessories inside. It can be a huge pain in the butt.
Are the snakes happier in a tub as opposed to a cage? hard to say. I'd say they are probably about the same![]()