This is a great mouse for the price you pay. I purchased this mouse in mid-2023 and it's starting to die on me. After 18 months, the battery still holds good charge (gets to 70% after a longer gaming session with RGB on but it does die quickly afterwards), lights work, unfortunately the left and right buttons are wearing out. I use it for gaming so you can guess that the click-count on those is high. Previously I've owned much more expensive logitechs which have lasted me longer but they also had less bells and whistles. That's your trade-off essentially.As far as the size of the mouse and the grip goes, I found it comfortable. It's what I would call an average sized mouse and it's a nice grip. I have a hard time reaching the 1,2,3 buttons with my thumb and 4,5,6 are not a great ergonomic reach either but i don't need that many buttons. The software it comes with has a good amount of control and customization options and you can assign lesser used features to those buttons if you use macros or what not.

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Purpose:The reason that I originally bought this mouse was for gaming. And on that front the mouse has been great. Having all of those side keys on the single mouse has made gaming a lot easier. Now, I tend to use those keys while also using the computer for non gaming relater purposes.How the mouse feels in the hand:I think this comes down to everyone's hand size but,for me the mouse is really comfortable and can use it to play games or work for many hours and not have an issue. The only thing I am not fond of on this topic is that at the top there is two types of finishes. Most of the mouse is this sandy plastic which feels really nice. put then there is this little smooth section right at the top. Definitely not a fan of that.Side Keys:The side keys was the main reason that I purchased this mouse. Just having the ability to 12 additional keys on a mouse is great. And there is also an additional key on the right side of the right clicker. Just from looking at the pictures I thought that the keys were going to be too small when purchasing the mouse but, the are actually quite large and I am able to use all of them while gaming. However, it does take a little getting used to and memorizing where all the keys on the mouse are with your hand from numbers 1-2. Again as these side keys were the main reason that I purchased the mouse, and I have been very happy with it.Battery:Battery lasts a fairly long time, and you can just charge it and use it at the same time. I don't know how many hours it actually lasts but seems long enough. Just keep in mind that while charging the mouse and using it does add a little bit of extra weight but should be an issue. Also keep in mind that battery drain rate will vary if you leave it on with the lights or turn them off while using the mouse. This is easily done on the bottom of the mouse where there is an option to turn ON or turn ON With Lights.Software:The software is really easy to use. It is really easy to assign the mouse keys to any key you want them to be. You can also create multiple key binding lists for differing purposes. And you can record macros and have a list of them as well. You are also able to see how much battery you have left as well. And you can configure the lighting on the mouse and change the speed settings. I personally never have the lights on the mouse on.Conclusion:I have had this mouse for a little over three months now and it has been great. As stated above I bought it because of the side Keys and because it was wireless. I'am not a fan of a wired mouse. So far the mouse has been working great. The keys are responsive when clicking them and you can change the DPI of the mouse depending on what your are doing and what game you are playing. Which the two arrows at the top of the mouse let you change the DPI easily. Personally I think this is a great product and would buy it again.