I have a candoia carinata carinata.
Pros: They stay small. You don't need a huge enclosure to keep them happy. Adults have slow metabolisms and may only eay every three weeks or so.
Cons: They can be very nippy. They are very difficult to get on rodents, let alone f/t rodents. Took me the better part of 18 months to get them off of feeder anoles.
Jerry Conway used to (maybe still does?) have an excellent website on candoia in general.