You must buy more than one because putting the second one together will make you feel like a genius after fumbling around with the first. It does snap together but you must watch that the tabs are over the bottom layer before snapping together.  The reason I bought this was because it said it's waterproof. It's the summer and hasn't rained yet so I hope that's accurate. Just wondering how a hold up after winter of being outdoors. Again, time will tell. The color is actually nice. Very light and goes with surrounding colors.
It really does hold a lot. I got one for the deck cushions and two more just for the other pool equipment.  I would not use it to sit on. I do however lay my foam cushion floatations on top to dry and keep flat as recommended.