Post motorcycle accident I’ve tried nearly all the ergo mice, and this is the one I’ll stick with. Good to be able to use ambidextrously, very intuitive and no learning time. But!! The base is a point of contact for the ulnar and needs to be padded from the factory.

This product has had a positive effect on my wrist pains from day one. Easy to use and easy to set up. I would have liked to have a softer padding on the bottom of the mouse to rest your wrist on while using it. Other than that it is a great product.

Started looking at vertical mice after starting to have wrist pains with the tons of clicking I have been doing for work. Gave this a try after looking at a couple of options and worked out really well. Took about a day or two to get used to it but love the fact you can switch between hands with the front switch. Also the hand feels a lot better during the work day compared to before with the regular office mouse, so highly recommend to give it a try if having pain/tightness in the wrist too. I got medium because my hand is roughly around 16cm but I think I could have gone for the small too. The second one I ordered is a Small to compare t...view more

Love these Penguin mice. This is my fifth one in 4 years. You only get a year out of them before they crap out but they are the best for avoiding carpal tunnel and working those shoulder muscles.

Excellent product. The joystick-type shape takes a bit of adjustment personally in getting comfortable with the pointer precision, but otherwise this ergonomic mouse (along with an ergonomic keyboard) has done much to alleviate my RSI aches and pains. The fact that you can easily switch between left and right hand makes it just that much better.

I've been using this for about 3 weeks and it's noticeably better than my old 'vertical' mouse for wrist pain. The difference is that the penguin is a lot more vertical - my wrist is almost totally upright and straight while using it, while my old mouse (an Anker) was more like 45°. The battery is also very good so far - I haven't needed to re-charge it since the day I got it. My only complaints are that I couldn't try out the different sizes before buying it (I need Large according to the size chart but have to lift my forefinger up to reach the button, so think Medium may have fitted me better) and it's a bit overly expensive.