As mentioned in another review, it is not easy to open the grid when the mattress is below the edge of the bed. In our caravan (about nor had a bed so that we could not just enjoy it lift him) meant that we had to pull up the grid only once over the edge, so it came up. On the other hand we were so well sure that it does not slip away when our son go again with the whole body of the net.
After 3 weeks of continuous testing, we are absolutely satisfied. Star deduction only for the somewhat cumbersome Open.