Hello my dears, Sure you have the many reviews gelesen- among others the not so positive. We have also informed much. Yes the mattress is thin, but it is not a thing to buy a new one. But this product is just great. Very easy to build, together, strong and chic. If you were to buy this combi bed einzelt, you will be going on certainly more money. The problems that were listed in the other, is not been with us so. We are fully satisfied and are eagerly awaiting the birth date. Many Thanks!