Pros: I've been using this keyboard and mouse combination since 2011 and both continue to work just fine. No issues with the keyboard, no issues with the mouse. Battery life is still great. Both are wearing very well after having been used for so long.

Cons: - Bluetooth reception can get spotty (mouse will start acting strange) if there are any objects in the way of the USB transmitter. - That Logitech doesn't make anything equivalent to this any more.