I’ve been using this for two years with a Handstands beaded wrist rest and it’s genuinely changed me life. I had chronic wrist pain and probably carpal tunnel (I hate going to the doctor). Swapping from a Logi M705 (which I loved) to this cured my pain after a month. Cured. If you’re looking at this because you have wrist pain give it a shot. This one is for small to medium sized hands. The MX Vertical is for the hands of giants (at least to me, that thing was way too big).
I hope they fixed the left click button. Mine lasted a little over a year and the left click button became less sensitive. I had to make sure my click was nice and firm. I was bummed that it stopped working. If you read reviews this was not uncommon. I have an Anker vertical mouser that was cheaper and has lasted longer. This style of mouse can definitely help pain in your wrist, elbow and in my case, shoulder blade.
Awesome, I was just about to Internet what’s the diff between the two and if it’s worth the extra bucks or not.
Now I need to figure out if the white, cheaper Mac one is the same thing or not.
These are $49.99 at Mom’s right now. And new too!
The black and white pc ones are $49.99.
The white Mac one and Pink one is not $49.99
Laughed out loud at your comment - I use the same Handstands wrist rests, but I love the MX Vertical that I use for my daily driver for my work machine. The Lift model was a cool option, but it simply didn’t fit for me at all 
These are some good ergo options though, for sure!