If repeat ordering is a recommendation, then I must like this mouse, since this is the third one I've bought.
Genuinely plug'n'play, this is very easy to set up - stick in the dongle, wait a few seconds and it's ready to go. It has all the usual functions, most of which I never use. It moves smoothly even without a mousemat and I find the scroll wheel works very well - getting it to go at the required speed and stop at the looked for place becomes second nature after a while. But what makes this mouse my favourite is the ergonomic design - it fits my hand perfectly and as a result I get far less discomfort in my wrist than some other mice (mouses?) have caused.
On the downside, the reason that this is my third is that I find the mouse tends not to last for more than a year to eighteen months or so before the buttons or wheel start to stick. Each time I think I should try a different brand but after much browsing I come back to this one because, when it's working, it works very well and because I find it so comfortable to use. So recommended but with reservations.