I really like the window squeegee because it squeegees well and it lies well in the hand. No need to apply pressure for a good result. That's particularly important when you have a whole house of windows to clean or do it professionally. Everything that saves my wrists and elbows is a beloved tool.
However, there is still room for improvement.
I would have liked the possibility to exchange the rubber blade only to avoid unnecessary plastic garbage.
I also would have liked a third size. There is one squeegee for small panes and there is this one. And I would have enjoyed an even larger one for large windows.
I did not buy the sini telescopic handle even though I would have liked to have a telescopic squeegee generally because I have quite some tall panes to clean and don't enjoy ladders.
However, if you stand on the floor and try to squeegee above your head you would need the telescopic shaft to have a tiltable head as a squeegee needs to lie on the pane quite straightly and evenly for a good result. The angle you stand in relation to the pane decides how to tilt the squeegee.
Conclusion: it's already difficult enough to find a squeegee that actually squeegees well and without much pressure and the sini squeegee does just that. I really like it as it is.
I would buy it again. I already recommended it to friends and family.
But it's not the unicorn one and only squeegee that makes all dreams come true.