I have only recently bought this product to store garden tools.  It had obviously had a bash during transit and there was some damage to a couple of the panels. However, this didn't affect the strength and the damage was internal so I decided not to try to get a replacement.  It went together very well but some of the instructions could have been a lot clearer.  I erected it on level ground without a base - this seems absolutely fine. The base seems reasonably tough but I've added a plywood sheet to be safe.  Whilst it's reasonably strong, if you lean anything heavy against the sides it bows - it could do with a tie bar across the top.  Storage capacity is good. I've had some rain and it's kept dry.  I bought a 40 x 51 shackle lock for it - it's a bit fiddly to get on and off - a 50 wide version would have been better.