Summary: (Tech Knowledge ranking given is to be the assumed level required to work the mouse.) I give 4 stars only because of the aforementioned con.
Pros: Opened the mouse, plugged in the usb wireless receiver and it worked great. There's a very helpful on/off switch on the mouse to save battery life. The sensitivity and the response time are easily, in my own opinion, superior to optical and trackball mice.
Cons: The one con of this device that might influence me to return it is a fact that's not mentioned in the description anywhere. Maybe I should of researched it a little more on a search engine, but at no point in the newegg description is the word "notebook" listed. That's interesting because this is...
Summary: I have always trusted logitech in the past and was very happy with this purchase. A very compact mouse with the micro dongle kept in the mouse. The mouse fits in your hand nicely, but I can imagine it would be to small for someone with large hands. Easy to install.
Summary: Had one of these before, but after a few years of fairly heavy use, the buttons produced a double bounce every now and then. I have half a dozen other mice on other computers and this one is up there with the best.
Excerpt: I hadn't had any experience of wireless mice until i got this little beauty, before it was optical wired and trackballs, they seem a bit primitive in comparison to what Logitech has on offer here with the M505.
Pros: Long battery life, easy to set up, great performance
Cons: needs AA batteries, and two of them so make sure you have spares just in case
Summary: Very quick, just plugin and setup, no drivers for Windows 7+. Have yet to see if the battery life will live up to the advertised specifications but I have no reason to doubt it. It's nice and fast and responsive.
Summary: when this mouse arrived it was the right mouse but the wrong colour. I returned it and asked for the correct one.when it arrived the packet showed it to be red but then opened the contents were still wrong (black). so at this point I gave up and settled for it.