Unfortunately, other manufacturers don't have this feature, which means Logitech is the only choice for me. The freewheel function allows for easy scrolling through long pages, and the smart-scrolling function ensures that it is activated automatically. I would rather they had just designed a separate mouse for these people, since by far the largest group is now the victims of this choice. It may be a godsend for regular editors and Excel users, but it will be of little use to most. Logitech has chosen to add a horizontal scroll wheel to the MX Master 2, which will be one of the reasons that the thumb buttons have been moved back.

The 'ledge' that your ring finger half rests on on the MX Performance is no longer there, and when I miss it I notice how big the difference is. For the front phalanx, which you usually use, they are simply too far back. The thumb buttons are oddly placed, as it apparently has to be operated with the back phalanx of your thumb. Strangely enough, the ergonomics are a step backwards compared to the predecessor of this series, namely the MX Performance (I don't count the MX Master 2, the 2s is simply an overhaul after problems with the regular 2). It's just that in this class there are other mice that fit better in a hand than this one.

The MX Master 2s is a nice mouse to look at and the shape itself is fine. Shape/ergonomics decline compared to MX Performance

Logitech mx master 2s manual