In general, they don't make good pets (meaning very, very few of them actually tame down enough to be handled even on a limited basis). That's pretty much all you need to know concerning iggy's.

They get very large, can be very mean---biting, tail whipping, etc.---and require a HUGE amount of care.

This is a giant committment your friend is looking at. I would recommend---as you should to your friend---that he/she hold off until he/she is positive they can handle this committment.

---And please, please, please don't think that if it gets too big or too mean you can just give it away. Jo mentioned that she has a friend working in Iggy rescue... sadly, there are far too many iggy rescues for this very reason, and still too many abandoned iggys.