Kensington Pro Fit Ergo Vertical Wireless Mouse- Black (K75501WW), 2.8"x3"x4.4"

This review is just my initial impressions after using this mouse just for a few hours. I believe this is a new model, as I could not find any other reviews of it online.I've been using a vertical mouse of another brand at work for about 2 years and decided it was time to get one at home as well. Although the angle of this mouse is almost the same as the other one (A wedge shaped model that is sold under a few different brand names), the feel is a bit different and movement seems more accurate. I think the reason for this is the flare towards the right bottom of the mouse, which keeps the edge of my hand on the mouse instead of dragging on the table. I also really like the scroll wheel, which is a grippy rubber, wide enough that it looks like a ball. The wheel does not do left/right scrolling, but I am not in the habit of using that feature anyway. I don't tend to use the thumb buttons either, but the back button seems to be in a natural spot, with the forward button being a stretch for my thumb.If you haven't used a vertical mouse before, be aware that it takes some time to get used to one. Much of the accuracy of a regular mouse come from wrist movement. Since a vertical mouse is designed to keep your wrist straight, that accuracy suffers. With my other mouse, I've gotten used to it, but still not as good as a normal mouse. I am hopeful that this one will be good enough for photo editing. I'll update this review after using it for a period.Update 12-8-19: Uploaded some images comparing 3 of my vertical mice. The Kensington in the middle, a semi-vertical on the left and the wedge shaped Chinese mouse on the right. The feel of the Kensington is very similar to the mouse on the right, but it is a little wider and my thumb does not tuck in as close to the rest of my hand. Since my thumb is where I am having the most issue requiring a vertical mouse, I am still experimenting to decide which I prefer.

I am in front of my computer for at least 8-10 hours a day so Ergonomics are very important to me and I have tested and tried out dozens of different mice over the years. This has got to be my favorite so far. It is easy to hold in your hand and is very responsive with no lag. The scroll button is easy to use and is easy to clean also. Battery life is great also.The only small thing to improve on, is I wish it also had Bluetooth so you could use it with Bluetooth instead of just with the nano usb adapter which would free up a port on my laptop.

I wanted to purchase an ergonomic mouse to help with my comfort when using my computer. Several of the standard mice I have used in the past, like Logitech, are just too expensive for me at the moment with their ergonomic line up. I found this Kengsinton version that was the right fit for my hand and is easy to use at a more affortable price. The one draw back with the mouse, is that you cannot program the extra buttons like you can with other high end ergonomic mice. The two extra thumb buttons can only move you forward or back on a website. It would be nice if they could be programmed to turn up the volume or some other task I regularly use.

Let's start off with credentials. I work all day long in front of the computer as an animator and I play plenty of competitive online games on the side. I've owned over a dozen mice in just the last three or four years once I really became a computer enthusiast; everything from 13 dollars, to over a hundred, and in all shapes and sizes, ergo mice, to gaming mice. Suffice it to day, I like to think I know a thing or two about what makes a good mouse.But most importantly of all, I've actually owned this exact mouse before, but it went by a different brand name, Victsing, and was half the price of this Kensington mouse when I bought it. I thought that thing was the bees knees when I first got it two years ago, but boy, I realize only now what I was missing out on. The shape and button placement is exactly the same as the previous one, but the sensor, oh the SENSOR!! Good heavens, you really do get what you pay for.Out of the seven wireless mice I now own--with the exception of a wireless gaming mouse that costs NINETY-EIGHT DOLLARS--this is the only one that has pinpoint accuracy, with no stutters and no cursor drift at all, even when subjected to my COMPLETELY unrealistic testing (which is just me sliding the mouse back and forth AS FAST AS HUMANLY POSSIBLE across half my desk. It's a simple test, but it'll VERY quickly reveal an optical sensor's true performance capabilities, as, at higher speeds, a bad sensor will actually stop registering movement, or even literally begin to register the mouse moving in the opposite direction.) Something about the sensor, or the onboard processing, or maybe just the rock solid connection to the usb dongle of this Kensington mouse, makes this thing perform more like a 60 or 80 dollar one instead. It punches WAY above its class in performance, while still keeping all the ergonomic aspects I loved of the previous brand of this same mouse.The weight is very nice, nothing like a lightweight gaming mouse, but that's absolutely not the point of this thing anyway, so I don't dock it for that at all. It glides very well indeed on the dainty little pads, the clicks are wonderfully light, the shape is still as perfect as ever, even for someone who has miniscule hands like myself. The build quality isn't TOP notch, as I can very easily see overlaps or gaps in the plastic seams, but they occur only in places where your hand doesn't touch anyway, and it doesn't even matter, because it's held together very solidly anyway; no creaking of any sort.TL;DR:Of all the ergo mice I've tried, none feel better in the hand than this one, and the performance is way WAY better than I ever expected at this price point. If you're on the fence, just do it. Unless yours arrives broken, I can pretty much guarantee you won't be disappointed.

That's a great product. I felt uncomfortable with regular mouse and it really made a difference.

High lag slow to respond, overshoots target all the time.I can’t operate with this.Today I thought it may be the battery, pulled it out and it was low but the new one measured 1.59 volts with my Fluke and the mouse is still garbage.It’s not good with small movements either. Imagine spending 4 seconds trying to grab the side of a window to resize it.Update: I need a new mouse because it quit responding completely. Not worth $12All of the frustrations I have had to put up with over the last year and my kids hearing me stressing while working from home.