I've had this mouse for a week, and using it for regular use (when not at work) with a Bluetooth 3.0 laptop. Not sure which revision this mouse is (as I wasn't aware of the differences) but based on the descriptions this Orochi could be either a 1st or 3rd generation device. Steam says I've pulled 45 hours of gaming in the past two weeks, and I'd say roughly half of that was spent with this new mouse (so about 20 hours gaming use, plus normal use, but certainly idle during sleepytime and while at work). I also want to note that I have been using this on a "battery-saving" 3M Precise mousepad. To be honest, I am somewhat disappointed with this purchase, especially given the price. While I think this is an excellent gaming mouse (if a little small for my large hands), it is a lackluster Bluetooth mouse. Pros: tracks smooth as butter, precise tracking, sweat-resistant top coating, nearly perfect weight with batteries (IMHO), no noticeable lag (but its been a while since I've used a wired mouse), and it works without installing included software. When about a foot away from my laptop, it never seems to glitch out unless the batteries are low. The Orochi tracks extremely well on both my mousepad and my (wooden, finished) desk, which has developed a slight sheen from years of mousing without a mousepad -- a surface which the mouse this Orochi replaced, an older MS bluetooth laptop model, had trouble with. Also, it looks pretty slick... even if it doesn't really go with my laptop's red motif. Cons: The most annoying would be its obnoxiously short battery life -- I've changed batteries twice on this thing in a week! Sleep and wake-up times are set too aggressively on the former, and work too slowly on the latter: taking my hand off the mouse whilst reading a web page often results in having to wake it up when I need to scroll down. Meanwhile, it seems to take 3-5 seconds to fully wake up and, annoyingly, only seems to do so after the second (or third) click. (Also, the time it took to write this paragraph, up to the beginning of this sentence, was enough to put it to sleep... as was the first sentence in the paragraph below. C'mon I'm not that slow!) The wake-up time becomes particularly cumbersome when you need to use it after going AFK, like when you're watching a movie, or have to step away. While I love the Orochi's mousing action, and half of me is happy to have a suitable Bluetooth gaming mouse; I also hate this device's quirks and thirst for batteries (thank god for rechargeables), and the other half of me regrets tossing the box because it's going to make returning it all the more difficult. The MS bluetooth this Orochi is replacing tracked 70% as well for 4x the battery life... and it took two AAAs! :( Also, I think it's worth noting the software really oversteps its bounds: despite the fact that I have never installed any Razer software and never plugged this mouse in with the included USB cable, it somehow managed to make a window pop up in the corner of my screen advising me to install the software! WTF? CREEPY! Also, why does a mouse need cloud functionality? I don't want to make an account to receive marketing messages (through its omnipotent tray app), I just want to tweak settings!