The keyboard is so-so. Seems to work ok, but took me 3 weeks to get even close to comfortable typing on it. Very randomly sized buttons and weird spacing just didn't feel anything like the other microsoft natural it was replacing.The mouse on the other hand was designed by someone without hands. It took all of 5 minutes for it to start hurting my hand and wrist. Not to mention the amazing amount of jitter. If you hold it still for a while and then try to move it again there is almost a second of lag for it to realize you are moving it. Doesn't seem like much to most people I am sure. The problem is if you play any kind of game it can ruin them for you. All in all a horrible mouse. I replaced it 2 weeks after I purchased this combo.