You really need to pay very close attention to the instructions. I found it like a black belt level IKEA construction exercise. I missed an important point really early on - the whole thing is nearly square but not quite. I had the floor at 90 degrees to where it should have been. I thought I'd read that correctly but clearly not. I'd got a fair way through putting up the walls before I realised and had to back track quite a bit.

A few other similar tricks along the way. For example, the door looked like it could hang either way. It could, but the door handle would fit correctly only one way. And some of the supplied screws were faulty but fortunately they ship more than enough for each type so no problem there.

I didn't have enough room at the rear to put all the screws in. One corner was too close to a wall. But I have enough screws in that I don't think it is going to fly away on me.

In the end I'm very happy with the result.

I also purchased the shelf kit. I would recommend this instead of getting your own. The fitting system works really well, and I had no problems following the instructions.

Don't be tempted to buy your own third-party shelves. The walls are plastic remember. Fitting something to them with screws might not give a good result! A small free standing shelf unit would work ok.