Just the cons
Dongle: Oversize, other brands have nano receivers, this looks like from pre historic age. Chances are that this will bump around when the laptop is carried around. There are USB plugins that do more than this in half the size.
Mouse: Two batteries and not good battery life. My other mouse(single) battery lasts for 6 months. There is a sure lag in the mouse some times and jittering is always there. Can’t avoid it. No switch off button, Not sure(not advertised) if the mouse goes to sleep mode when idle. The pads / plastic tacks on the bottom of the mouse are not good quality and make sliding noise when operated even on good surfaces.
Keyboard: The most CONny item in the pack. Could not get used to even after hours of daily use for more than 2 -3 weeks and then kept it aside. Buttons are disproportionate in and the bottom row is something I had to always look to use.The small arrow keys are useless. The extra part on the left(Where the batteries are inserted) confuses the key locations and(more in the start) the fingers land on the empty part for some keys.
All in all, keyboard is not for regular users, and mouse does not perform as well as other brands in the same price range.