1. Only two-stage filtration - grid + HEPA (I consider the minimum necessary three-stage - grid + washable foam filter + HEPA. In fairness, vacuum cleaners with ONE stage filtration have appeared - only HEPA - do not take these, you are tormented to clean!) By the way, attention! The instructions say the filters are washable. Mesh yes. But no HEPA! It's paper - don't wash it. It must be tapped and cleaned with a brush. And by the way, I made the foam rubber filter myself (I cut it out of the foam rubber filter for the hood - see photo). After that, HERu can be practically not cleaned.
2. There is no filtration in the docking station other than the bag itself. (add the same HEPA filter at the outlet, otherwise some of the dust will fly back into the air through the bag).
3. Periodically "unstuck" from the Wi-Fi network (twice in 2 months). After that, it becomes impossible to control the vacuum cleaner from the application. It is treated by rebooting the router.
4. The lack of a remote control (see above - if you "fall off" from Wi-Fi, or in principle for any other reason there will be no Internet. Control will be stupidly reduced to on / off-home, on the case. The remote control could insure. There are also older people who are not friendly with smartphones.)
5. A small compartment for water (although my apartment is 60m2, it is enough at maximum supply and still remains)
6. Poor, I would even say miserable, equipment (Moreover, when unpacking, there were a lot of empty compartments in the box. That is, apparently, a much richer equipment was originally supposed, but then someone was "crushed by a toad." Considering that for 2 thousand I bought the richest set that will last me for three years, see above (rather, the vacuum cleaner will die), and you need to understand that this is with delivery, customs, outbid interests, etc., that is, the cost of 500 is very strange)
7. Large dimensions. (it doesn’t fit everywhere where my previous Gutrend Slim went, for example, it doesn’t fit between the legs of chairs in the kitchen)
8. No indication of a full bag, clogged filters, running out of water, etc.