Got this for my 3 year old son and he loves it. Took us two days to build with help from two friends the first day. Instructions were clear, just don't read ahead, do them in the right order! The pre drilled holes were very helpful. The wood was softer than I thought it would be and a few boards had a tendency to split on the ends but all the weight bearing boards were sturdy. I don't feel the boards that split slightly decreased the safety at all. Overall very happy with it! Time will tell on how well it holds up.