The mattress is quite thin but babies sleep well there. The "tour" is washable, what we did before using it the first time.
Attention, the feet of the attachment system to the "stringer" requires special dimensions Babybjörn accessories sold very expensive too. We bought a bigger mattress (for mattress 60x120), to use it we had to make small incisions to pass the straps and ensure the resilience of the mattress. We should do the same when buying a larger house sheet.
Of course, the bed is very expensive, it is an investment. But I do not regret as it is easy to store and carry.