Summary: If it wasn't for the price, I would give it a 1 egg rating. Also the aesthetics of the device looks really tacky and "over designed" like it was forcefully made to look high end but failed -- it doesn't have the modern minimalist design that is the trend these days, but this was expected.
Pros: Cheap cost. Mouse is perfectly fine and responsive.
Cons: Cheap quality. Keyboard is near-useless. I type 80 WPM and it is unable to keep up -- meaning letters are left out as I'm typing. I have to literally slow myself down to 40 WPM typing to make sure every keystroke input is registered.
Summary: If you need a mouse and keyboard under $20, this is for you.
Pros: Great budget mouse and keyboard, Mouse is responsive with no lag, keys do not stick on keyboard and have a nice light feel and both the mouse and keyboard are very high quality and not some flimsy plastic.
Cons: The only one I can think of is a small backspace key but that is just personal preference.