Amazing ergonomics, wrist and elbow pain gone after three weeks.

Horrible DPI and limited options to customize. I would say this is borderline-functional for basic office tasks. Gaming, video production or any task that requires precise detail is completely out of the question.

Not a good product, I'm going to keep looking

- Great ergonomic design that fits the hand so comfortably. - Good weight to it, easy to move about and has wonderful functionality. - Works great on any office tasks and is a dream in photo editing. - If you have any wrist issues, this will make it so much easier to use a mouse without pain. - Works even with my bigger hands.

- Sticker shock. The price is a big pill to swallow, but if you can, it is worth it. - It is a bit on the basic side for functions. Wish that it had a button to speed up scrolling with the wheel like my older Logitech 705 Marathon. - Hard to adjust the speed settings for the mouse speed button, but that is minor.

A very good all around mouse. Makes my life so much easier and pain free when using my computer. Well, worth the investment, even if the wife is still choked at my buying it.

I purchased this about a year and a half ago. It was hard for me to spend so much on a mouse (I remember paying around $160). But it has been worth every penny. I use it for my full time office job and my gaming hobby. I think Have weakness and pain in my wrist and with using th is I definitely feel a difference. It’s really hard to go back to a regular mouse after getting used to this; it takes some time but it really is more comfortable and the position of your hand feels so much more natural after a while. I would definitely repurchase if/when I need to.

Very good for wrist pain

This is an incredibly comfortable mouse for extended use. If you suffer any repetitive strain, I would encourage you to look into getting a mouse like this to help.

This takes getting used to - you have to click with a gentle touch, otherwise, you will push your mouse when you don't intend to, causing click-drag. After using it for a few months though, I don't find any trouble using it. I have one for work - I am not sure how well it would stand up for gaming.

Great mouse for its purpose, and amazing at relieving strain caused by repetitive stress.

I have been starting to get some forearm strain (Carpel) from years of computer use. This has helped immensely. It took some time to get used to, but has made a big difference. Battery life's been very good. No complaints about the buttons/clicks/wheel. Weight is not bad (could be a tad heavier, but not a complete showstopper).

As has been mentioned before: - Doesn't fit too well under a stowed keyboard tray (good thing it's wireless - doesn't HAVE to be left there). - Until you get used to it, because sideways mouse buttons mean your not pressing "into" the desk, it's easy to click-drag by accident. - Because of the height, typing and sweeping your hand over the mouse to transition to it, I've tended to catch it and smack it off the desk.

Probably not quite worth the price-point. Very happy with the relief I've had with my forearm/hand cramping. Definitely takes some getting used to, and I do still (after about 3 months using it) prefer a traditional mouse - but it's a trade-off for the ergonomics. Would like it to be a bit heavier, but it is comfortable to hold. Not perfect - but overall a solid device that serves its purpose.

Comfortable design (though it takes a bit of getting used to) and rubber surface stops hand slipping off

Mouse is taller than traditional mice and doesn't fit under my desk when trying to stow keyboard tray

It's only been about a month since purchase so I can't speak as to whether it's reduced strain or not, but I'll assume the science underlying the design is working. I wouldn't recommend trying to play FPS games with it, but it does everything else computer-related just fine.

- Wireless and wired options. - Responsive motion sensor.

- Find the mouse too light and no option to adjust the weight. - Scroll wheel is awkward to use comfortably when center clicking. - mouse too light, while wheel is too resistant to clicking. - Mouse is better suited for people with smaller hands or someone who makes the effort to use an active handshake grip with the mouse.

- This mouse is not worth the $129, maybe half that price.