CSL – Vertical Ergonomic USB Mouse – Wired Optical Mouse TM137U – Mice with Ergonomic design – 5 Buttons – 1600dpi – prevention against mouse arm tennis elbow – For Laptop Desktop PC Computer Macbook

Really, if you have RSI, get this.
As a long time sufferer of RSI and having previously tried the Logitech M570 trackball cordless, I thought I’d give this a try. The Logitech M570 was brilliant for 6 months till my thumb became very tender and painful which is a shame because that is a very high quality piece of kit. I may return to it once the thumb recovers, though this may turn out to be temporary because it is heavy on the thumb. Ordinary mice are out of the question, just a day with one makes the RSI return with a vengeance. It isn’t as sophisticated in action as the Logitech M70 Trackball. I wish Logitech would do something like this, there is clearly a market for it as I’m sure those of us crippled with RSI will buy them.Enough moaning about my cold dead hand and the R&D failures of Logitech and onto this little rodent: No drivers to install, it uses the generic drivers in Windows, so it’s plug and play and installs pretty much instantly. Inserted the dongle into a spare USB port, added the batteries to the mouse – they were included, alkalines too. Then nothing happened on the mouse end, no lights, so I took out the batteries, put them in again and it woke up flashing red on the stripe which is the only time the flashy curl on the side of the mouse actually does anything. Build quality is good, much better than I was expecting at this price. It’s quite light and comfortable to hold.After eleven days of use, I must say the RSI hasn’t yet returned. I’m sure this is to do with the more vertical hand position, there is no tiny turn needed at the shoulder which keeps the deltoid and trapezius muscles on the right in tension, leading to neck pain on the opposite side, due to the body attempting to balance forces using the left trapezius. There’s no twist or strain on the forearm muscles or wrist either. Consequently, you are able to use this mouse with a much more relaxed position, comfortable too if you get a bean bag wrist rest.The middle click takes a lot of force, and it’s given another facet to my RSI. Switched back to my Logitech Trackball till my thumb hurts. I can’t believe I have to switch between three mice. Bring on thought controlled cursors, then all I’d have to worry about is headaches and brain tumours.I have no idea what the gentleman is on about in one of the reviews where he complains about the mouse moving when you click the left button – this will not happen if you possess a thumb. It works brilliantly, though it’s a little bit dozy, meaning it nods off to sleep within a couple of minutes but you can easily wake it up by moving the mouse wheel up and down a bit. There is no indication of what DPI you are on when you press the DPI toggle switch – it’s using generic drivers so there is no real facility for it to tell you. This mouse very occasionally (very rarely) misses left clicks made while the mouse is still moving but that’s a minor niggle compared to the pain it saves you. You get used to it very quickly and compensate subconsciously. This is the sort of thing that would have been fixed by proprietary drivers and software had the manufacturers programmed them, which they would have if they were Logitech, who sadly don’t make vertical mice. If Logitech had made this, the Forward/Back buttons could be programmed to do things like Cut/Paste or Page Up/Down for instance, or indeed any available key combination, but those buttons are not programmable on this device.My verdict: Really, if you have RSI, get this.Update: After using this mouse for over a year, my hand developed RSI in brand new ways, too much twisting at the wrist because the angle is not close enough to vertical, this mouse is not vertical enough! After much deliberation, I bought an Evoluent, sure it’s expensive (and the Evoluent mouse software setup is not a matter of plug and play, very lazily programmed), but bearing in mind RSI stops me making a living so the buying substantially more expensive Evoluent made sense, it’s much more upright and occasionally the pain returns in the hand (not the arm, shoulder or neck), which is when I switch back to this less vertical mouse for a few days, then back to the Evoluent etc. Let’s face it, gripping mice while sitting at a desk is not something we have evolved to do, therefore those of us with RSI will always suffer with it to some extent. This mouse is a good start but I find switching between mice of various types prevents the buildup of RSI pain. When fingertips become paiful, soaking individual fingers in Ibuprofen helps: wrap each digit in gel filled cling film for an hour at a time.

Super prise en main, installation rapide