Owner for a day, I will update it in the future.
First of all, as a gaming mouse, I would rate it as average to "medium-light" weight, but the weight is located on the palm side and does not strain the wrist, which is perfectly logical considering it has a 945mAh battery.
It is very sturdy, precise even at high speeds, comfortable, and ergonomic in the hand.
The response is immediate, whether wired or wireless (1ms).
The buttons are not the quietest, but they have excellent feedback.
The scroll wheel is very good and does not mix up the up and down movements like some more expensive mice (like the g502).
In FPS games, I made flicks that I have never done before.
With motion tracking and analysis at 400 fps, I noticed that it does not have any phantom movement or any kind of sensor correction.
With a lift-off distance of 2 millimeters, it will not record any unwanted movement.
The wireless charging is done through the Qi protocol and is quite fast, I would say (260mA from the pad).
After 5 hours of continuous gaming at 1000Hz with full lighting, I lost about 3-4% of battery (maybe due to the first use not being calibrated).
In conclusion, with a cheap Qi pad (I got mine for €1), you can create a high-end gaming setup with minimal cost.
It is not worth spending more money on big brands.
10/10
update 15/1/20: Four days after a full charge and with 10 hours of gaming per day, a low battery warning came up (<=10%), so the characteristics of 40+ hours of usage on a single charge are fully true...the last 2 days, I have the feeling that there is a slight gap between the side plastic and the mouse frame, but this seems very good to me because it gives a better grip sensation.
update 8/3/20: Almost 2 months after purchasing it, it feels like the first day...of course, I have adapted to it, but the plastic clicks, scroll wheel, etc. have not changed at all...the only complaint I have is about the software, which is terrible, but other than that, the mouse is worth its price.
update 15/12/20: A friend of mine tried mine and compared it to the dark core RGB SE, which he also has, and he says that he found the Sharkoon more convenient for strategy games...I'll just leave that here.
update 8/1/21: One year later, the mouse is still great...it feels like new...of course, I take care of it, etc., but neither the battery nor the sensor nor the wireless functionality have deteriorated...something that owners should know is that on a fabric mousepad, dust accumulates in the sensor area, so much so that it hinders proper tracking...it can be easily cleaned with a slightly damp cloth, I'm just mentioning it so that you don't say that the mouse breaks after a short time.
Update 6/1/22: 2 years later, the battery started to drain...it lasts about 3 days, but when I put it on charge, I see in the program that it goes from the bottom to the middle, and if I unplug it, it goes back down...so I opened it to change the battery...I put a new 300mAh battery in it, and the mouse became super light...it feels like I bought a different one...of course, it doesn't last 4 days, but with wireless charging, at the end of the day, I put it on the pad and in the morning, it's ready for action.
Update 15/6/22: It was replaced with a G Pro Wireless and passed on to my brother, who let's say is a bit rough...it still withstands mistreatment...if you are on a limited budget and want something durable, don't be afraid of it