Considering it's a basic peripheral, none

Bluetooth settings altered only fixed the freezing problem, the cursor is still shaky and jumps around if the h/d is working. It's also not a full size mouse, it's quite a bit smaller and only connects via Bluetooth.

Crap, it's gong back

Bought this mouse yesterday and spent last night using it. After seeing Jessie's comment below (above?) I disabled the Windows function to make Bluetooth devices sleep, and had absolutely no problems. The mouse is super responsive, it's got a great click in the buttons, and I love that I could reprogram the swipe on the Windows button to whatever I want. Set it to back in the browser, and love feeling the vibration when it registers the swipe.

Nothing so far, though I'd imagine the battery life might be shortened by Windows not being able to put it to sleep.

A great, comfortable mouse, highly recommended.

latest drivers, win8.1, works for 10-20 minutes fine......then drops.

switched back to my old nano mx, happier. finger print magnet. too narrow...squashes my finger nuts.

have newer AC intel wifi card with latest bluetooth....should be backwards compatible..... not so. thought i would save a port on my notebook by going bluetooth other blue tooth devices work fine....on my new Lenovo Yoga i5. NOT READY FOR MARKET.

Reasonably comfortable, windows button. No USB adapter necessary as long as you have a laptop or PC with a bluetooth adapter.

Could be a bit larger, glossy surface really shows finger prints and smudges. Windows default driver settings for bluetooth adapters cripple the experience with this, and presumably all bluetooth devices that don't use a USB adapter.

Had problems with this mouse, and my bluetooth Mighty Mouse dropping connection, in both cases sometimes they would reconnect on their own, sometimes they needed to be disconnected and re-paired. The fix for a stable connection to this mouse, and presumably all bluetooth devices is going into Windows device manager, finding your PC's bluetooth adapter, and in the driver settings power management tab, uncheck the setting that says "allow the computer to turn off this device to save power.

does not require a usb dongle, works on existing bluetooth wifi card on your ultrabook/notebook. (ie frees up a usb port)

continually disconnects requiring full unpairing. continually sleeps requiring 10-15 seconds to turn on. not ready for market (using intel-AC-BT 4.00) with all recent drivers...advanced user.

having a mouse that doesn't stay connected is extremely frustrating. Iam going back to my logitech nano mx...which has been a reliable mouse.