I have an adult male Aru-type GTP and I have to say, they are awesome. I keep it in a 24 x 24 x 18 cage that I built myself, and it is big enough for him and he is about 4-5 feet. He was quite snappy when I got him but with a little handing has calmed way down. I can even help him get shed off the back of his neck occasionally without him pulling away or getting snappy. I would not recommend getting a snake that tends to bite to any beginner just because if the owner becomes too intimidated by said snake they are not going to handle it enough to calm it down. GTP's can also be quite tame at times and get aggressive suddenly like flipping a switch, and from what I have seen they dont calm down as easily as other snakes, once they are pissed off they are pissed off until you leave them alone. But like Davo said a lot of this rep comes from wild caught animals and ones that were not handled enough when young. Any snake can be an exception to the rule so handle the particlar snake you want and see what its attitude is like. I have also seen GTP's that were very docile and just as "safe" as handling a red-tail boa or Ball Python. If you really want a GTP you should probably buy a slightly older animal like one that has gone through it's color change (1-2 years old) because most of the extreme health issues and problems with the spine are more prominent in younger more sensitive animals. Also by then someone has probably worked out any aggression issues the snake may have had. Read "The More Complete Chondro" by Greg Maxwell! If you follow the advice of the many people who have kept them before you and are willing to provide a proper environment for the animals they are not that hard to take care of, just do your research first.