I have the Magic Mouse 2 - Its good for precision, but has limited gesture support. You can scorll with it; you can use your fingers to swipe back and forward on websites; also you can use it to right click and get contextual menus, but it misses all the others gestures you get by virtue of using the Magic Trackpad 2 or the New Magic Keyboard / trackpad.
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Also You can‘t pinch to zoom. However its nice to use alongside the Magic Keyboard case, as you get the both of best worlds - a mouse and a trackpad 🙂