I give this opinion a little more than a year after buying this mouse performance level not fault this mouse is effective for gamers: fast and accurate. In addition, the drivers allow precise adjustment of these parameters. Why 2 stars? For product finishing is rotten (both say things as they are), glue it started to sink sides of coating a few weeks after purchase (and counting) and the click wheel already working.
Edit: Even problems with a second model (adhesive and defective wheel), product AVOID.