Penguin Vertical Mouse - Wireless Large

I've worked on a computer 8+ hours a day for over twenty years now. One thing I've found is that on top of daily stretching, it's good to switch between several different types of mice and trackballs to help avoid repetitive stress injuries. When I saw this mouse I just had to add it to my rotation.

Unfortunately, I instantly hated this mouse. It's way too big even though I measured for the large.

It feels very odd in the hand - not ergonomic at all.

I hate that I have to move my entire arm. It's so imprecise and clunky because of this.

The primary button feels terrible. It's big and rounded and has a lot of "squishy" movement. I can hear and feel the spring on each click which feels really cheap.

I have < $20 mice and trackballs that feel better than this one. I will definitely be returning it.

Great mouse, I'm just use to buttons that click faster. It's difficult to double and triple click. I would give it five starts if the buttons were more responsive.

I like the fact the mouse is wireless and switchable between left and right hands. It holds its charge for a long time- only charged it once and have been using it for several weeks. I rate it 4 stars due to every once in a while the cursor jumps to the top of the page; or the connection is lost with the computer so you have to turn it off and on. I do graphic work all day on the computer and the mouse is great.

I really love the Penguin ergo mouse. I acclimated to its unique design rather quickly, and appreciate the USB cord re-charging, no messing with popping batteries in and out! Although I am right handed, I have always preferred to use a mouse with my left hand, but in recent months I was experiencing a fair amount of discomfort with my left hand. Switching to the Penguin that discomfort initially lessened and now after using it for a few weeks my discomfort has disappeared.

The concept for this mouse is really good and I wished it worked for me. I thought I would find great comfort when using it but that didn't happen for me. I tried both the Large and Medium mouse. I have used other ergonomic mice in past and I do think this one is tops for design concept but it irritated my elbow too much to continue use. I think they need to tweak its design just a little more. I had troubles with using it for precise mouse movements. As well it did have an issue where the window would move up and down and the mouse pointer jumped occasionally making "clicking" things difficult. But this may have been caused by my finger hitting the scroll wheel...at times I think I felt this happening. I ended up returning both though. I originally was looking to replace an older ergonomic mouse I had. I went again with buying the Microsoft Natural Wireless Laser Mouse 6000. This was what I was originally intending to replace but was having a hard time finding any for sale. Since it was very difficult to find one, it may not be an option for others. But to date this has been the best ergonomic mouse I have ever used. And I am on the computer for many hours a day since I do software development for a living. So I cannot afford to use a mouse that causes any irritation.

Other than it having quirking moments every once in a while (microbursts of scrolling back and forth), it's the best ergonomic mouse I've owned.

This product does exactly what it said would do. I had part of my right wrist cut out and replaced with rebar and cement ( So Joke bone cancer) so using a mouse was a pain.
I looked at several ergo mice or mouses,and took a gamble on Penquin, it paid off big time. It works for me maybe it will work for you.
If you have trouble with recharging plug into computer not a hub. Also tech support in England at the manufacture is the best.

Again very very good product.