I try to take a break from my usual track pad on my laptop and use a variety of other pointing devices when possible. This one worked well, subject to a few limitations.=== The Good Stuff === Opened the box, connected the USB adapter, installed the battery, turned it on, and presto, mousing away. It took more time to open the shipping container than to install it. The on/off switch and the sensitivity switch worked well, and about as expected. The click-wheel did not take an excessive amount of force and the mouse felt comfortable in my hand. The on/off switch is a nice feature- it means you don't have to remove the battery to save battery life when not in use. Also there is a room in the battery compartment to hold the USB adapter.=== The Not-So-Good Stuff === Mice are either too big or too small. This one is too small at least for me. My hands are normal sized (usually take a large sized work glove). The USB converter just begs to be lost. It is small, and a bit of a challenge to get in and out of my laptop. There didn't appear to be any obvious way to turn it off (either through HW or SW), so one it is inserted, it is live and presumably using laptop battery power. I do not believe the mouse works on standard bluetooth (it wasn't recognized by my adapter), so you are committed to carrying the extra USB adapter. The mouse pointer was occasionally a bit jumpy, especially on the highest resolution. The mouse also occasionally forgot the resolution setting if left inactive for an hour or so.=== Summary ===There are a number of things that could have been better, for for the price, it makes an excellent travel companion. It is inexpensive enough, and simple enough to install, to just keep in my bag as a spare. I wouldn't want to use it everyday, but it certainy has its uses.