At last we're thinking of left-handers!
There are almost a billion left-handed consumers in the world, often sidelined by plan-plan right-handed designers and unimaginative manufacturers. And since we're not all as talented as Leonardo da Vinci or Jimi Hendrix, it's a real drag. So it's great to see that ordinary left-handers are being thought of.
Unfortunately, I agree with the other reviewers that this mouse is child-sized. I don't have a very big hand though (between 7 and 7.5). As a result, it's not very comfortable to hold. What's more, I find it far too high.
I'll have to wait and see, but I've had to use mice upside down for over thirty years now, and it's not going to be easy to change with this mouse, which doesn't quite live up to its promise. It's a shame.