Merely attaching the grid using the two brackets (left and right) on a removable spring something I found a bit "stiff". It is probably because I (as the first child in the hospital and used usual) a "folding variant" had expected. The I personally liked better, because much more supple and easier (even with one hand).
But the grid here is robust, stable, and I have absolutely no safety concerns. 3 stars mean yes "not bad", the quality is good, handling "is ok" but there are better ;-)