Great for doing jigsaws in bed, which is where I have the most space. Before, I had a whiteboard I was doing jigsaws on, but it usually got covered in dust and gunk quite easily, so I was looking for something else. I have a jigroll, but I hate sitting on the floor (too many damn spiders about) so I bought the Portapuzzle Deluxe. Easily the best jigsaw buy I ever made. I have a couple of 1000 piece puzzles that don't fit, but I can easily do those on the jigroll, and the Portapuzzle is great for doing smaller jigsaws too (i usually do 500 piece ones).
I usually fold it back on itself, and if there's a jigsaw in it, I usually leave it folded like that on top of my guinea pigs cage, or on top of the chest of drawers, with the loose boards placed on top of the pieces to keep them together and prevent me losing any. Haven't lost a piece yet!
Mine appears to be well made, and I can make up bits of the jigsaw and move them around as needed, no problems there. I've read a few reviews that said it was too big...what size did you expect it to be? And as for saying it's not like the description...they tell you exactly, you have the two main bits that zip together, and two loose boards. The only downside to the Portapuzzle is, unlike the Jigsort, you can't remove the tray you do the jigsaw on, but then, the Jigsort is far more expensive and to be honest, I think it's great for the price. The whiteboard has gone to my mother! Far better than the Portapuzzle standard, and far cheaper than the Jigsort. I'm glad I bought it.