Very nice gadget.
I bought it mainly to dry my brushes faster (I discovered that there is also a brush dryer for €15 but it had no reviews so I wouldn't easily trust it).
The two largest brushes I have are the 03 Nyx powder (which I also use in the video).
And the second one is the 112 foundation Mon Reve.
With the branded rechargeable batteries I use, Varta, I find that for these two large brushes it has a good rotation performance.
I can't say that they cleaned well at least for the foundation, which is harder to remove.
The powder brush cleaned just fine.
In general, for cleaning I use the silicone pad from SHEIN.
About two hours later, I found that they had dried, which is quite encouraging.
The only thing left to see is how long the device will last.
Anyway, for the above criteria, I consider it a good purchase to have clean brushes quickly.

It is not very powerful to rotate large brushes but with a little patience it does its job, it definitely needs strong batteries and it would be good for the brushes to stay in the liquid for a while before cleaning them more easily. I find its use convenient though because you can dry them at the end as the device rotates faster.

You will waste your money, it broke on me and all the bristles on the brushes became very hard afterwards. It is not convenient at all, it takes up a lot of space. I would tell you not to buy it, it is the worst thing that has ever happened to me and it will happen to you too

It washes and dries them up to 90% immediately and also has a base to let them dry 100%. After a short time, they are ready for use again. For the 7€ that I bought it, it is perfect.

For professionals, it is convenient solely if you need to dry a brush within 30 seconds. Otherwise, during washing, the battery does not have enough power to rotate the brush in the water effectively cleaning it. It requires, therefore, that you wash it yourself afterwards. However, I repeat, for quick drying, it is incredibly convenient!