After serfing many reviews on G903 I got baited by its promotion about insane battery life without charging, which, in fact, is true. After my new mouse arrivied I immediately found out that left click is not stable (shown in the video) while right click stays still and doesn't have the same problem. After using it and playing games with it the left click was not causing double click, however it was still annoying to use. I contacted Amazon and got my replacement thinking it's a manufactre defect. The second mouse arrived exactly with the same problem, the only difference was its less annoying while playing, but still not perfect. In addition, the second mouse had problems with battery capacity. Since I already knew how slow it takes the mouse to drain power from my first ordered mouse, I was disappointed to see the replacement going twice faster with battery usage. The difference in comperance was significant. While mouse A could hold % charge over night at the same level, mouse B on the other hand dropped 5% over night for no reason with absolutely the same settings. So even if you still going to buy the mouse, pay attention to this point, because it is the only positive side of the mouse I found myself.
After this experience of using both mouses at the same time I found out that they feel different. They had different issues. While some keys work well, the others feel like piece of cheap chineese plastic scrap. I do not get it. The clickers of my 5 years old mouse were in better condition than on those two "next gen" mouses. It feels like to produce that saving power optic they had to sacrifice good clickers and replace them with 5€ mouse like. And it is sadly not only about clickers, thr mouse just doesn't feel good in hand as well, despite the fancy design the plastic looks and feels too cheap. I really liked the feature with battery, but it is not worth it. I don't know how many mouses they produce with this huge amount of manufacture defects, but I didn't want to risk it again and decided to return both of them. I bought the newest version of G502 and I am happy with it. It has lower battery capacity, but at least I feel like I hold 140€ in my hand and not 5€ noname mouse.
It all happeened to me a month ago, I took this time to cool down about what happened, so I could be as much objective as possible. I hope this review wil help you to decide whether you want to buy it or not.