No offense to all you rodent lovers, but try the trackpad! Go to settings and turn all features ON, and goto accessibility Mouse and trackpad, trackpad, turn on enable dragging - three finger drag. I didn't believe it at first, but after being encouraged to try it, I'll never miss a mouse!
Trackpad's features are very good, but not good enough for some types of work. I tried editing video using only trackpad... too slow and imprecise.