Sugar gliders are easy to care for, provided you have the time to spend with them. Gliders bond with their owner and require constant attention. If you don't have the time to spend with them everyday, you should get a colony of gliders (2 or more).
Gliders are very smart little critters. I have had to leave my hand in their cage and let them bite me, because if I pull my hand out, they quickly learn biting gets rid of you. My little boy (he's about 9 years old) likes to curl up in my pocket to sleep, and if he's out and gets scared, he comes running back to the pocket.
Cages must be as tall as you can accommodate. Sugar gliders are climbers, and they like to be high up when they sleep. My (modified) cage is about 5 feet tall...and I have seen some that are much taller! My cage is actually 2 ferret cages stacked on top of eachother (without the base on the top one). I had to cut the wire floor of one of the cages so that it became one giant cage, and I wrapped the whole thing in "chicken wire" (I don't know if that's what it is called) because the openings between bars in the cage were too large.
They are nocturnal, and can make quite a racket at night, so you'll need to keep the cage in a room that no one sleeps in.
Feeding is easy because they are omnivorous.
Overall, a great loving pet if you have the time, but remember one thing: You must be committed to keeping a sugar glider for the duration of its life. Being torn away from an owner it has bonded to can be devastating!