For me, a window sucker has two qualities that make him appear as a possibility:
1) The suction property causes the sucked points really not a drop remains. This is especially an advantage if (like us) extremely hard water comes from the line, which immediately leaves traces of lime even in minute quantities. This makes it appear particularly suitable for shower enclosures.
2) The process is fairly free of streaks. Who wants to do without clean windows and on tricks a la newsprint, for which it is well worth considering.
So, what does the whole package at Leifheit? When unpacking the unit itself in three parts, a charger, an extension (30 cm) and a Putzendstück with rags revealed. The extension may be connected to both the device and on the end piece, both of which have a corresponding receptacle. For whom the extension is too short, is also longer in the program by Leifheit, including a telescopic model.
For me the battery was empty when delivered. An indication of the charging time was not in the manual; only on the packaging emblazoned indicate 60 minutes. Whether this refers to the charging time or battery life, could not be determined. I connected and wait until the lamp was made of what took about 1.5 hours, the charger.
Leifheit promises that the battery for about 60-80 square meters is rich; I feel this is realistic. Using a special sensor ensures that the full suction is accessed only when you really attaches the suction lip somewhere. Also it works flawlessly. Significantly less enthusiastic I was from the water tank. Firstly, it is very small: even the shower sucked and the tank is filled nearly up to the mark. Is released by pulling a rubber stopper. I say even with proper care, a fairly short lifespan before especially since so often needs to be emptied through the small tank. This is also better.
What I lacked, also was a holder, such. As for the wall. But this I draw from nothing, because the competition has something to my knowledge, not (yet) available.
Conclusion: the device works as promised, even though you should not rely on the manual this possible. For this and for the outlet tap I subtract a star. Otherwise, a recommendation for those who may need such a device.