It is a decent product, the only reason for a 3 is because the panels don not fit well, I had a couple replaced. The screws keep falling out and I had to make modifications. Don't kid yourself, it's not easy to build. I'm in the business so I have ample tools and bits to make it work. The size is great and does the job for the money. My use is a temporary storage shed so I did a wood deck for it but it's really designed for a slab. The base will cost you half as much or more then the shed.