This is proper Scandinavian quality. As I am from Norway, this was such an amazing find. The wood is all treated, thick, sturdy, and omg so many screws! If anything, it's overengineered. As you can see from the picture, one slab of wood has come off of the stairs, but actually that's the only design I didn't like about it. Or rather, my daughter didn't like. It's almost impossible to climb with wellies. I have since screwed out every 3 slab, and that works brilliantly. As an added bonus, the slide is easy to screw on and off, only 2 screws, so that slide has been used so many places during all these lockdowns.