I'm a PC gamer who enjoys a variety of different genres, from FPS, to RTS, to MMO games. After previously owning a Razer Naga Molten Edition mouse which featured 12 side buttons, I had become so used to using these side buttons as in-game macros that it was vital I could do the same thing with the next mouse I buy. This is the reason I went with the Logitech G602, as it features enough side buttons to satisfy MMO and RTS games, alongside a comfortable design for FPS games.
The G602 definitely feels like a solid mouse. The external casing implements four different materials; a textured 'sandpaper' feel to the area where your thumb goes, a rubberised soft layer where your palm sits, a matte plastic for the two main buttons and finally a plastic silver trim to give the mouse a sleek look. What I like about Logitech mice is that they don't go for the stupid gaming designs with pretty lights and funky designs, they make their mice from high quality materials with a professional look and feel. The buttons themselves feel rigid and have a nice click to them, and the mouse is the perfect design for avoiding finger prints due to minimal gloss. I definitely feel that the G602 could take some beating, and if you ever dropped it, it would very much stay in-tact.
Comfort and Responsiveness:
Compared to my old Razer Naga this mouse feels a lot more ergonomic and feels particularly nicer when I'm just casually using my PC and not gaming. The mouse itself is fairly large and the side thumb rest ensures my fingers aren't dragging across the mouse mat, something which happened with my Razer Naga. Personally I have long fingers and my thumb is perfectly capable of reaching the macro buttons all over the mouse. However, sometimes I find my hand resting quite far towards the back of the mouse and I accidentally click the middle side button instead of the ones nearer the front. This is just something I will need to get used to though as it is a brand new mouse. As mentioned before, all the buttons feel good and responsive, and you won't accidentally be hitting the side buttons with your thumb whilst gaming. The one part of the mouse I really do dislike however is the scroll wheel. The scroll wheel feels very stiff and requires a lot of finger movement if you're trying to scroll quickly. In addition, the scroll wheel material has a really slippery rubberised surface which my finger constantly loses grip of. Unfortunately this mouse doesn't support settings for changing the scroll wheel sensitivity.
In terms of responsiveness and latency, there are no issues whatsoever. My main concern with switching to wireless was the possibility of lag, but there really is no difference between this and a wired mouse. I'm not even using the USB extension cable which comes with it, and it still feels great. The difference between performance mode and endurance mode is very subtle, with endurance mode running at 125Hz compared to performance mode at 500Hz. I myself can notice the difference in games, so switching between the two modes is something you'll have to get used to. One amazing thing to mention about this mouse is the battery life, which I'm sure you've already seen in the description for the G602. Batteries last for months, it really is amazing for a wireless mouse.
Problems with the Mouse:
The first problem I came across with this mouse was the driver software, and you'll be amazed at the solution to this problem. If you're running Windows 8/8.1, you'll likely find that the driver installation software freezes at about 60% and the only thing you can do is turn off your PC to get rid of it. I looked online for a solution and it turns out... you have to unplug your optical drive inside your PC in order for the installation to work. Don't even ask me why, I have no idea, but it seems to work for the hundreds of other people who had the same problem, including myself. This to me is a very serious issue with Logitech's software, as not everyone has the experience/knowledge to open up their PC and fiddle with cables, especially if you own a laptop. I even tested out a friend's Logitech G400 mouse a few months ago on my PC and the same driver issue occurred back then, Logitech have yet to fix this after months of it being a major problem. Once the software was installed though I was able to setup my macros and DPI without any problems.
The next issue is the weight of the mouse. Even with just one battery inserted in the mouse it still feels quite heavy. I play at a low DPI sensitivity and so if I'm turning fast in-game, I have to lift my mouse up and down off the mouse mat in order to do so. I find that the mouse slips slightly from my grip every time I lift it, which is an annoying problem in fast paced FPS games. Due to the batteries being at the back of the mouse, it also means the back of the mouse is where you lose grip first when you pick it up because it's heavier in that area. The weight isn't a major issue and I can still play games perfectly fine, but I just wish it was a bit lighter.
Overall the mouse is great and I'd definitely recommend trying it out. If you're like me and play a mixture of game genres this will suit you well, and the wireless feature makes it a lot less messy on your desk. Amazon only lets me choose 4/5 as the rating, but I would have it set to 4.5/5 instead. If you have any questions feel free to leave me a comment!