I just set this up for my 16 year old daughter yesterday.  The build required two people but we were able to handle it without any issues.  It's pretty sturdy and doesn't move much when my daughter goes up & down it but I think I will still secure it to the wall with some furniture straps just so that it's a bit more secure.  I may cover the ladder rungs as they are a bit uncomfortable on your feet; I will wait to see if my daughter complains about it.  Overall I'm very happy with it and its a good value for the price.