I recently bought the ECO600 to replace a mouse that came with my desktop system, which i didn't particularly like.
The mouse has been excellent so far. Not only does it look good, it's well made and comfortable. It fits my hand well without being too large.
The laser tracking is great, even on a desk i usually have trouble with, and the wireless never misses a beat.
Being a gamer, i was tempted to buy the wired gaming mouse, but am certainly not dissapointed with my choice. The mouse performs as well as i could hope for, and has enough buttons to make most gamers happy.
All in all, a great quality mouse, and a steal at the price. Highly recommended.