Before this mouse I was using the Logitech MX 518. It was a great wired gaming mouse and after 3 years of owning it, it is still just a great as when I bought it. The reason I wanted a new mouse is because I had just built a new Sandy Bridge machine, and I wanted to get rid of almost all of my wires with the new rig. After reading hundreds of reviews I finally found the wireless mouse for me.

Look and Feel:
This thing really looks great. It fits my hand perfectly. It might be a bit big for the smaller handed individuals but for me its perfect. It glides on my glass desk and really compliments my Logitech K800 keyboard.

Performance:
This mouse performs rather well for any task I throw at it. The adjustable scroll wheel is great, and I have never blazed through documents so fast. I have changed the zoom button to act as a middle click since it can sometimes be difficult on the scroll wheel. The expose feature is more for adding more bells and whistles I believe. I can see how some users will love it and other (like myself) will forget its even there. I do wish the battery indicator would tell me its status more often. Speaking of the battery, this thing holds a charge pretty well. I will say I wish it was a bit more, but I am just being picky. I only have to worry about charging it I would say every 9 days. The tracking is perfect. Smooth and precise. I did have some problems with this mouse tracking on glass. It only works for me if the receiver is pretty close (within 6-8 inches) and the battery is above 25%. It will be a bit hit and miss if I don't hit this criteria, but its not hard to achieve. The unifying receiver is also a really nice touch and only took downloading one more driver to work.

The Package:
I normally wouldn't include this in a review, but logitech did a great job in this aspect. They include all necessary cables, a wall charger, and even a little leather bag to keep it all in. Premium product at a good price.

Conclusion:
This is the best wireless mouse on the market for desktop use. It has great tracking, great look and feel, and many great features. If you are looking for a great wireless mouse for the home or office, THIS is the mouse to get.