Very happy with this purchase, I rate this 5*. It does the job and is the perfect size for what we needed. The insert boxes are from B&M 27x27x27. There was a very helpful review on here about the box spaces, if you don't put the 3 thin back boards in you get double the cube space so rather than this being 6 storage cubes it turns into 9! Hope this helps. The one thing we did find difficult were the instructions but we got there in the end. Happy with the end result!