Plus what he said^. My male is around 3 1/2 feet right now and absolutely wonderful. When I first got him he was a little hissy but never struck or anything. I keep him in a ap t8 cage and he seems to love it. As for rainbow boas, I have one as well but not even close to an adult. She is about 3 feet long and still feeding on small mice but she has always been very easy to handle as well.
They are both beautiful snakes and tons of fun to work with. I'll be buying one more of each in the future.haha