The pieces were super easy to assemble. Just slide the rods on one piece into the holes on the next piece to connect them. I was a little disappointed that the rods/holes were not hexagonal like the instructions state. That would have locked them into position either straight or at an angle. Instead, the rods/holes are round, so the panels move around (accordion style) and won't stay in a straight line. There are suction cups on the bottom of the panels that might help if you're using it on a hard floor or smooth mat, but they're useless on carpet or textured mat.

The quality is certainly there. The mesh seems very strong and its very easy to collapse and put away. The same goes for putting it together. It just folds in or out. The reason for not giving it 4 stars is the padding on the floor. We had to put additional patting as its too hard. So keep that in mind when buying this play pen. I would recommend for its portability and the zipper at front.
Nice to keep baby out of trouble at home. Once he became mobile we had to do an "upgrade" as we noticed he was starting to hit his head on the X shaped metal bars. We tried some alternatives but the best so far was wrapping the metal bars with pool noodles (see picture). You'll need 8 pool noodles and some cuts (buy some extra in case you mess up). Use 2/3 of a pool noodle to wrap the internal bars and the remaining 1/3 to wrap half of the external bar. The pieces will also need a longitudinal cut along the length to fit the bar in. You'll also need some small cuts in the middle of the longer piece to fit the center rivet, where the mesh is attached to the bars. We got the pool noodles at the dollar store nearby for less than $10 and since ... full review