Good keyboard overall. Used with Windows 8.1, most of the key bindings work, really useful for sound for example.
Mouse is smooth and easy to use. Cool thing, above the ESC key there is another click button, so you can hold both ends of the keyboard and use both thumbs.
Right shift and backspace are quite small, but you'll get used to it. If you need this keyboard it's probably not to write a novel anyway right?
You WILL have to use a USB extension if you don't have the dongle directly in front of you, or reception will be intermittent and very frustrating. Behind the case or in front of the case but at floor level will have bad reception. Once next to the foot stand of the TV it started working perfectly.
Only bad point is the software that is supposed to help you re-map keys. It is a steaming pile of garbage that does not work... I mean not at all! People have been complaining about it for years and it is still completely broken.
You can live without it, so not a really big deal.
TL;DR: Get it if you want to control your PC from your couch, at this price there is no competition and it's good.