About the price / performance ratio is debatable. Just under 10 euros for a so slight and not really high-quality processed plastic is in my opinion really got a lot of money.
Negative becomes apparent that the plastic enclosure of the rubber lip exact same dimensions as the rubber lip itself. However, the edges of this plastic bezel are not rounded but cut straight and quite rough. This means that there are unsightly scratching noises when it runs along with the puller as vertically at the edge of the shower enclosure. Of course, the danger with plastic to scratch something small, but you have just a little careful. The same applies to the removal of the bathroom tiles on the edges and in the corners, so that the silicone joints are not damaged.
This might be avoided by would make the rubber lip just a few millimeters wider than the rim. Show Other pullers how to do it better.
Conclusion -> Good, but not very good. 4 stars.