I’m generally in favour of these. However, I’ve a few problems with them.

On a few occasions now at least on bottle has been empty.

I also had one where the clips holding the bottles to the wall were just stuck on to the tiles and hot screwed and the all fell off the wall. One fell on my foot which was unpleasant, but I was thankful it didn’t fall on my child.

Like the OP I think I have seen 5 products but not all in the same room. The most is 4 plus bar soap. This generally mirrors the offering from when the mini bottles were offerred.