Excerpt: ONLY reason I need to get a new set is, I wore out the rubber on the scroll wheel! Otherwise it works perfectly every time. Keyboard is still 99% though the arrow keys are now starting to wear off! :-) Can't seem to find the wireless mouse 5000 on it's own, so getting a new set makes sense, as I'll then have a spare, working keyboard & mouse. Great product.
Pros: 4 years ago I bought this keyboard and mouse combo and a year later built my own desktop gaming rig. I reused this mouse/keyboard rather than buying new because I was confident it was a good choice. 3 years later (4 years after I bought the combo) the USB dongle has just now died. I think it's really rare for a wireless dongle/keyboard/mouse trio to last 4 years, so I'm really very confident in recommending the purchase of this item.