I have own'd mine for a year and used it every day, so i think i can say i have some experience with it.
Build:The build is great, soft-touch-ish materials with a grippy side texture for your thumb, ring and pinky fingers. No complaints.
Buttons: Having all those extra buttons is something very useful and should not be looked over. You can have in-game COMS, TS3 COMS, Kappa bounded in twitch chat, etc. Also, infinite scrolling. Sounds like a gimmick, but its the most useful thing.
Weight: Back heavy due to the battery, Nothing really you can do except take the battery out and use it as a wired mouse. But it kind of defeats the purpose, eh?
Tracking and Delay: This mouse tracked just fine on my wood desk for the first six months and on my SS QCK. It never really has backed up and as far as i can tell, it has no acceleration. I find the delay on the mouse (in wireless mode) kept to a bare minimum. I can hardly notice any delay using this. I found the sensitivity of DPI i liked, witch was 1600 for my 1080 P monitor.
Software: Good stuff here. Making macros is nice and easy, and takes no skill. Every button on the mouse besides up and down on the scroll wheel and the toggle button of the infinite scrolling button can be changed. Allows for 5 different profiles, witch is nice.
Battery Life: My biggest Con about this mouse. It say 10 hours, but it is more like six. but, it charges pretty fast (45 Minutes for a full charge), so its easy to use in the morning, plug it in and go eat some lunch and come back to an almost full charge.
So yes, I do recommend this mouse.