HOBOT 2S

I purchased this Hobot 2S last month and used it for a couple of times in last 10 days. In general, I'm quite satisfied with it. Here are some points might be helpful for who is in consern.
Good points:
easy to setup and to use,
clear instruction with multiple languages,
mobile phone App makes cleaning even easier,
cleaning result is in a good standard: it's perfect for maintaining windows at a good level, a bit challenging for Hobot 2S to clean stubborn stains like mud stains or bird's droppings,
cleaning speed is acceptable comparing with its result, e. g. I cleaned 50 square meters glass, it costed around two and half hours in total,
Hobot 2S is very light itself and the suction power is strong, it gives a feeling that it will not fall off while working on a flat surface like glass. in fact, it didn't fall once.

Where may be worth to improve:
there are 3 cleaning pads comes along within the package, however, I felt 3 pads are not enough in general for cleaning 50 square meters, at least not in a good level at one go. It has to clean a window woth a dry pad first without the water spray function and then manually switch to another pad to clean the same window again with the water spray function. After a few windows, I found the pads become too dirty to continue cleaning windows. I had to wash the pads, waited them to become dry and then continue with cleaning again, which was already a day after. I will have to order more pads to allow me cleaning all the windows at one day. Luckily the cleaning pads are available to buy separately but they are not cheap in my point of view, 3 pads for 20 euros.
another point is about the water spray function, since the first round clean needs to be dry, I have to remember to manually turn off the water spray function, otherwise it may cause more difficulties to clean and affect the result. And certainly when it came the second round, I had to manually turn on the water spray function. I found this can be easily forgotten at least for the first few times of using. It would be nice if there is a notification telling or indicating the status of the water spray function.

In general, I would recommend this product, especially to who has the place with windows that hard to reach or clean. Hope this would be helpful!