almost perfect ... but a good storage system ... and without drilling

The bay itself is a great thing. And alone, the fastening system deserves more than five stars. Whether you have a house or live in a rented apartment, drilling in tiles is not exactly popular. All the restraint systems with gluing also can not always convince fully. But this system sounds good here with vacuum and is also good (at least until now there are no problems). It does not make a lot of work and gets back each.
Came the shelf, the two holders, the vacuum pump and, at first glance are not immediately recognizable as such, a template. So you do not measure, push ahead and already one can attach the brackets. The vacuum pump is simple and immediately stops all. Since the cleaning makes previously very soon more work. As with the adhesive systems should be cleaned before here the tiles thoroughly, so that nothing can go wrong. And if you want to install this shelf at a different location, no problem, lateral pull on the attachment again, the vacuum is released and you can attach the shelf somewhere. And the whole thing off without a trace.
What I do not quite like, the shelf is in itself. It is big enough so that you can properly what make it. But I prefer as continuous surfaces, rather than the grid. Then there are some, just small bottles or tubes, not so good. It is certainly the purpose of it. But even small items are not always safe.
The processing itself is quite solid, that fits into the price / performance ratio. Only I have my little doubt how long this shelf, for example, in the bathroom still look as good as now at the beginning. If you look closely, you can see it at the corners smallest places. And when added moisture, and can be in a bath avoid bad, it can sometimes be critical. In the kitchen may look quite different again.
The support system has convinced me the shelf and the processing is not so much. From therefore very well-intentioned but four points.