the bed is very stable, good quality. The bed frame is on wheels and can be mounted on the right side. The mattress should have to 16cm height. The mattress for the bed box should have more than 15cm height. the width of 90cm does not fit, you can not make all the bed box. I have a (rolling) mattress bought 80x200, 13cm high and fits perfectly. There is no danger that the child falls. I highly recommend the bed
