Hi I am really frustrated with the whole experience that I am receiving with MX keyboard and mx3 Mouse. The main problem can be summarized as lag issues. Indeed, in a daily basis, i am receiving a considerable high proposition of lag which have a negative impact about my productivity when I am using my desktop. You need to figure out a way to resolve this because I have paid a considerable high amount of money to obtain these two devises. You had to give us the option to plug them using a cable lifting these lags. I hope when you are going to realese the next version of mouse and keyboard MX4, it would be better.