My 8 yr old is IN LOVE with this bed. She is so happy to have the desk and book shelves all of which are very sturdy and have been decorated rather heavily. My wife (who is a little more than 5'3") had a rather easy time putting it together and lifted it to the wall by herself in about an hour or so. That amount of time makes sense for such a large piece of furniture. 
As others have said, the rails are a bit painful because they are round metal to match the style of the bed. We couldn't find the foam rolls with the sticky backing that others had said they put on the rails - instead, we used a combination of a pool noodle and duct tape. We cut the noodle to size for each step, made double-sided tape, stuck the noodle section on and then added security by taping the ends around the side bars. We made sure to let her pick out the duct tape since it would show - just an extra piece of advice since these beds are usually for pre-teens/teens.