Other things he may have failed to mention, is that youre basically home bound, unless you can find someone you trust 10000% to take care of it.  and since they arent legal everywhere, it can be taken away from you in a second.  and they will put it to sleep. 
i spoke to a lady in our area who had one, and had left it with a cat siter for a weekend or so.. the lady didnt shut the door completely and due to the fact that these are some of the most curious animals, it got out.
it was microchipped, which helped figure out the area it was in, but they didnt find it till a week after that.  laying dead on the side of the road.  if it ever got out, forget about EVER getting it back.
after this experience, i would never recommend anyone to get one.  not that i dont like him, because i think he is amazing.  its just a huuuuge responsibility.  
a total commitment.  and they live about 20 years.  and they say you cant have them around children.  
and like labret said, we have been very lucky with ours in terms of aggression, but we have an exception.  
i have heard of people, many people, getting stitches due to bites.  other household pets getting killed...
i guess it just comes down to the fact that after this experience, i am totally against people owning exotics.  there are too many homeless pets in shelters.  
my 
