I've had this product awhile now and have finally decided to replace it. The keys on the keyboard constantly get stuck, where I have to press them really hard to get it to push down - so I often skip letters because I didn't push hard enough and have to go back. I type really fast so this is beyond frustrating. I looked into getting some lubricant or something for it, but really, shouldn't it work without me taking it apart? The mouse has started to double-click when I single click, probably 80% of the time. Since I use Photoshop a lot and am constantly trying to make precise selections, this is maddening. I'll start to select an area by dragging and it lets go of the selection in the middle because it's double-clicking even though I'm not. I may never buy another Logitech product again! This guy is headed for the trash!
Connection was easy and it's been a great experience since. This is the most comfortable and quiet keyboard I've ever used - by far! I needed to adjust the settings for the mouse - kept inadvertently squeezing one of the many side buttons which then caused a variety of unexpected things to happen. Once I adjusted the settings (I turned many of the extra buttons off), it's been great. My wife and I both love it. I highly recommend it!