Defeating by way of charge, or lack there of... =\
28 March 2014
Summary: Like others have said, the length of charge is horrible. I get at most a day and a half of use before I have to recharge it. This is so inconvenient, that it becomes a corded mouse at my desk. But herein lies the defect in this device: Once plugged in and charged up, the charge through USB ceases, and you then are running off of battery even though you are still plugged in through USB, and even though the charge lights are all green indicating fully charged, as soon as...
Summary: I own this mouse for about 2 years now and it has been brilliant till date. Unfortunately it no longer works on Mac (after updateing to OS X 10.9 Mavericks). The mouse tracks and all buttons reacts to clicks but dragging is no longer possible which makes the mouse unusable for any kind of work. There hasn't been a firmware or driver update that would fix this despite the fact that Mavericks came out like 6 months ago.
Summary: I am one of 10% of the worlds population that using a mouse ergonomically designed for right handed people is uncomfortable. I would like to see a mouse of this quality made either symmetrical or with a left handed design as well, even if I had to special order it direct from Logitech. The only mice I see that are symmetrical lately are the lower end models, and I want quality.
Excerpt: My old mouse lasted a year (not this one) and a co-worker recommended this. I work with 3D CAD programs and use all the buttons including pushing down on the wheel ("Generic" button). The first Performance MX I purchased did not have any type of mechanical click for the "Generic" button and it would need to be held down for much longer than a click in order to work.
Summary: It seems like a great idea: A rechargeable battery in the device. But wait until you try it in practice. A regular computer user -- four hours a day or so -- will quickly find that the device needs recharging practically every day. And you find out in the most unpleasant day: erratic and unresponsive behavior. So now you are in a middle of a project and you need to plug in your "wireless" device so you can continue working while it is recharging.
Summary: Had this mouse since October 2013. It no longer charges. I replaced the rechargeable battery with another, still didn't work. What I don't like about Logitech is that you have to return a defective item first before receiving a replacement which means you either have to buy a wired keyboard and mouse in the interim in order to use a desktop computer. I've purchased several Logitech combination wireless keyboards in the past seven years (MX5500).
Summary: Not smooth at all, the tracking is like sand in Ball bearings. Really gritty ( makes it tough clipping images). Spend 10 hours a day doing design work. Not sure if it's lag time, due to it being wireless or what.
Summary: I needed a replacement for my aged MX Revolution. This is not supposed to be about the MX Revolution, but I just have to say that imho the Revo was the best mouse ever made, period. Unfortunately, the Performance Mouse MX is FAR from the Revo’s perfection. First of all, the PMMX’s shape, even though only slightly different from the Revo at first glance, turns out to be considerably different, and much less ergonomic.