Absolutely the worst purchase of my life!!  My wife and I had a hard time putting the basic frame together, when finished there were some hooks unused on the mat.  Called the company to find out there was an error in the construction of the parts and that the instructions had been changed to account for it!  The updated instructions were not with our purchase though.  We were so sick of the thing wanted to have someone to put together again or return, the company however was just willing to give us a ladder or ground stabilizer to balance out the inconvenience of being given defective merchandise with improper instructions!