This is a very nice mouse. I'm very happy with it. It took a little getting used to because of it's weight especially after using a small wired mouse. The settings menu comes up with a click of the side button and there are lots of readily available options for different settings. I'm not really a gamer besides slow moving games for old people but the mouse feels great in your hand. The battery lasts a really long time as well.
I upgraded from an MX Master 1. Definitely an improvement. Everything just feels a little more solid. I primarily just use the primary buttons, both scrollwheels, and the backwards and forwards buttons. But they all work great. The "silent" primary buttons are a nice touch over the more clicky buttons on the MX Master 1. Charging via USB-C is nice as well. (One day I'll be able to finally retire all my micro-USB cables...)
It is slightly hard to pick up, just because of the increased weight and slightly different shape. Not a huge deal though.
Amazing silent clicks but slightly less ergonomic feel compared to the MX Master 3 and 3S. The haptic feedback is not that relevant. The new 3rd button is better positioned than the previous button on the MX Master 3 and 3S, but takes some getting used to. Would recommend the 4 if you do not have any of these, but do not think worth the upgrade if you have the MX Master 3S already.
[This review was collected as part of a promotion.] I paired with my MacBook Pro and it works like a charm. Buttons are easy to use and lightning fast. I really use this more than my Mac one and so much better functionality than the Mac one. Love this.
Like the Mx Mechanical keys, i wish i could link the mouse to the keyboard so that Flow would carry both the mouse and they keyboard across devices. Besides that this thing is awesome. Good fit and feel in my hand, no fatigue, precise cursor movement, good battery life, and a million programmable buttons. Tempted to replace my gaming mouse with this too but its on the heavy side and the click is too quiet for gaming use. Would definitely recommend, and hope Logi fixes the software for Flow with mouse/keyboard link