Summary: It works in windows and supplements the mouse nicely. However, I can't recommend it as a mouse replacement. It would be much better if it was possible to customize functions/gestures a bit as I can with the Logitech mouse. As for the setpoint software that works with this and other Logitech products -- I'm not happy at all with how scrolling works/feels. A few versions back it worked perfect ... what happened????
Summary: I love multi touchpads, however accidentally drag objects while moving your cursor I think is the flaw in Windows touchpads. This is the reason why I use mouse when using my laptop. Apple got it right with 3-finger drag. Logitech, please also incorporate 3-finger drag. And with the Scroll option "Content move same direction as finger," the web browse back/forward did not change accordingly....now it is backward and un-natural.
Summary: I upgraded my Lenovo notebook to Windows 8 Pro and wanted to take advantage of some of the touch screen functions. This touch pad gives this opportunity but the performance is so-so. I am not sure that this is because of the touch pad itself or because of the slowness of the notebook. This being said, I DO recommend the touch pad if you want to get Windows 8 touch functions without a touch screen.
Summary: I had high hopes for this Touchpad and I am a long-time fan of Logitech products. Perhaps it's too soon to give a fair review of product only after a few days of usage but at this point, I'm not sure I'm going to keep it. My view is this is one of those devices that will soon end up collecting dust in my office on some side table. My main gripe is the the vertical scrolling while browsing the web.
Summary: Trying to use the Logitech t650 touchpad has been enormously frustrating. Some of it is my learning, but some of it is the device. Right click is very problematic. There is a big discussion here: http://forums.logitech.com/t5/Mice-and-Pointing-Devices/Touchpad-T650-right-tap-amp-right-click-having-trouble-hitting/td-p/920702 There are various workarounds. The root problem is that right clicking by touching the lower right corner doesn't work right on the edge.
Summary: it does the job but I'm not happy with it. -left click doesn't always left click. sometimes you have to do an actual click on the pad by pressing down. -right click are in the lower right corner which i often miss so it becomes irritating to copy and paste. -dragging a window, ie left and hold is irritating as well, you double click and move but you have to do it quick or else the windows maximizes. -scrolling is backwards...I use a magic pad on macs at work.
Summary: The touch pad works pretty much as advertised with one exception. The left / right motion of the pad is backwards. On my Win8 screen if I want to scroll to the right, I touch the right hand side of the screen and move left. (fairly intuitive and obvious) However the left / right on the pad is reversed. If I want to scroll the screen to the right I have to touch the left side of the pad and move right. Absolutely wrong. The top / bottom is also reversed.
Summary: having this for 3 months now it really annoys me every time i use it just becos i can't customize the gestures i thought i would get used to it, but no it should be like the mouse able to customize per application without it, it's not useful at all on a daily basis I wouldn't recommend anyone to buy until the customize feature is implemented it should be like BetterTouckTool in OSX until then the potential of the device is not unleashed