Simple, but very well ...

Wood:
Satisfactory -> a star deduction because I am of a slightly better quality wood and fitting (partly made of plastic) is assumed. But it met with security all its purpose.

Mattress: Good

Playpen bottom: The cover of the ground on which the mattress is placed was torn about 6cm in one place. This limits the function, however, not one and I found it not so bad. Nevertheless, a star deduction for it.

Assembly:
Really totally simplistic. Basically, my 3-year-old son has the thing mounted single-handedly. I pressed him my cordless screwdriver in his hand and told him what he must do. 10 minutes later got the part. The roles we have not mounted. Instead, we have glued felt pads underneath.

Conclusion:
All in all conforming to expectations in this price incl. Mattress. And since when you're really, the part is intended to 4-6 kilos rights movement sluggish small, mostly sleeping, hoodwink people, that is good too. I would buy it again. But for 4 or even 5 star lacks quality.