Well, I bought this mice after wanting it for a very long time. Logitech is an amazing company, and this product is no exception.
The mouse is very good. It is very sleek, and the feeling of it is just so amazing. I love the sensitivity of it also. You can turn it up to 3 DPI settings, the lowest is very low, the medium is what I use for just surfing and gaming, and the high is for very good ultra sensitive gamers and people who are really good.
The only thing I HATE is the battery life. A battery goes in less than 2 days. They are all rechargable, and it comes with 2 batteries, but having to keep switching them out can be a pain.
The mouse is amazing overall. The battery life is the only thing that limits the mouse. If it was better, the mouse would be PERFECT!! I do recommend it though if you can deal with battery life!