It's been my experience so far that they're not that difficult to keep. More difficult than a carpet but less difficult than what alot of people will tell you. As long as you keep the humidity up to them, you should have no problems. Having said this, keeping them too wet can have its own problems. It's a bit of a balancing act as far as that's concerned.
Mine weren't probed until about 12 months of age. At this stage they were still getting fuzzy rats. Slow and steady wins the race as far as GTPs are concerned (IMO). Here's a pic of one of mine (taken by Fuscus).
PP
http://www.premierpythons.com/pb/wp_...5c39757d2a.jpg
