I was able to buy this on sale for $65 and it is an absolutely steal for the price. There is no perceived latency during use and ergonomics are perfect for larger hands. The rubber side grips are still in great condition after 3 months of daily use. The battery lasts just under a month of daily use which I am perfectly happy with. My only gripe is that sometimes it takes a bit of time to get the mouse active after sleeping. There are also some connection lost when the battery is lower on power.