We have 2 of the $99.00 units that you get from Wal Mart. They have served us well using them in comps and camping at the beach. They are not very stable and I know if a good wind catches them while they are tied down to the ground, they frame would snap. It almost happened in Winchester a few months ago. If my wife and me had not been holding them when a storm front came thru, they would be scrap metal.
Also, we went to buy side panels. They were $15.00 each (I think that was the price) from Wal Mart. So, if we bought 4 panels at $15.00 each, well, you can do the math. Just a little short of the EZ UP from SAMs. The SAMs unit is much sturdier, thicker frame parts, and has the walls included.
While the cheap ones have lasted a good while, we will be purchasing the SAMs unit before next years comps.
wallace