I was attracted to this play pen over others specifically due to the compact storage capability because let’s face it, as a mom you know there’s enough bulky baby stuff around! I also liked the option for neutral colors, as it is this is going in my living room, and I wanted it to look as nice as possible. I was not interested in having any bright colors like the red blue and yellow ones I’ve seen. I also like that I had the option to buy extension pieces so I could make it bigger. I waited a little bit for the package to arrive. The shipping estimate was accurate but it came in the last day if the shipping window. No biggie.So, right out the box it was assembled, it’s light weight, I set it up by myself and it was very easy to maneuver. You arrange it to the desired shape then tighten the bolts with the provided “bolt” tightener. The inside wall with the toys is very cute. The little one seems to enjoy playing with the built in toys. The whiteboard is not a true whiteboard but instead, a sticker. I didn’t even put it up. We did opt to order the extra pieces as well as we didn’t want the little one to be confined to a small play area. I wanted him to explore. Attaching the extension panels were very easy. The extension option comes with 4 panels, alternating gray and white.In regards to the sturdiness of the pen, I feel that the pen without extensions was very sturdy especially with the rubberized bottoms. Having added 4 pieces, two to a side, I do feel the stability was compromised slightly by the larger size. I would not say it’s compromised to the point where it is unsafe. I am assuming our floors are not perfectly level, because there were some panels where the rubber feet didn’t touch the floor, this obviously is not the manufacturers fault. To resolve, all we had to do was put some rubber furniture stops underneath the panel feet that weren’t flush and it was perfect. It is definitely still strong enough, but the floors are definitely something to consider when purchasing this or ANY pen.The open design with the cloud and slits allow your little one to see you and vice versa, but it also is screaming to our little guy “climb me” so he is using these openings to learn to stand up.I wish the door would have a better device to open the pen, it is a button. If it was a latch style I think it would be a little more user friendly than a small button which, at least on mine requires 2 hands, one to hold the gate door and one to push the button.Overall, so far I am quite pleased with the product. Nothing was broken or damaged. It is a quality product and well made. It is a good size as is and it’s a great size with the extension panels.Update 6/3/2020:We had to do some further modifications to our play area to ensure complete stability. With the extension kit added to the regular pen, the middle section ended up giving too much. When our 8 month only used this area to climb to a standing position he actually fell quite hard even though he was being supervised. The feet were not touching the floor in all spot, we had used rubberized furniture stoppers to help. This did work, but with the added weight of an 8 month old it was still not as strong as I wanted it to be, especially after seeing the spill he took before. So we ended up moving a runner carpet from elsewhere and putting the pen on the play mat that is in the pic and the runner so basically the entire contraption is elevated on the mat and rug and is no longer on the hardwood floor. I wouldn’t change my review stars it’s still a great product. As mentioned this doesn’t seem to be a manufacturer defect in my opinion.