This pump is intended for a new project, but I am still waiting for the materials that I need further reassurance. I finally wanted to know if it works the way I want it, so I put them in the sandstone fountain next to the existing pump.
It's great to see the difference: while the old pump takes a lot of solar energy, ripples in the new and still water, when it is quite cloudy the sky! This is really awesome!
When assembled, the pump is very fast. The guide is available in English only, but the imaging is, of course, as are the self-explanatory handling. You choose one of three Sprinkelaufsätze (depending on your taste and needs) and sets the pump with its suction cups on a flat surface (eg stone), they placed in the appropriate pond or fountain etc. and provides the Panel to so that it can always absorb light and sun. It bubbles go!
The panel itself can withstand rain, but no permanent residence in the water. So it should be positioned so that it does not fall into the water. It is also important just to clean in hard water and / or leaf fall into the water the small pump regularly to long works reliably. That's no problem, they can be (carefully) take apart and clean.
In the photos is hopefully to see how great the pump operates, despite less than perfect weather. The left panel is the right (here-reviewed) pump, the right panel for the (old) left in the well-seated pump.
Conclusion: I love this small, but very powerful pump and forgive the full five stars!