I've been a long time user of the G602 and G604, but both were heavy, and the 604 replaced the 602, and has since been discontinued and not replaced. So after searching for mice with extra buttons near the thumb but also comfortable with a lot of the features I've loved in the 604. While the G502 X didn't fill all those needs, it's been a great choice.
Pros:
- Ergonomic - It just fits my (rather large) hand well in a few different positions, and is so light I've found my wrist fatigue has been reduced significantly. Unlike the 604, I can press every button easily without looking for them, particularly the scroll wheel, DPI adjustments, and 3 easy to find thumb buttons is great. It also feels comfortable, which is hard to describe, but the material feel is what I want in a mouse.
- Light - I mentioned this in the ergonomic part, but its super light. Apparently it's around 105 grams, which can be heavy for an ultra-competitive mouse, but for most gamers or folks just looking for a light wireless mouse, it's great.
- Great button feel - The older Logitech mice used to have a weird mushy click and my old 602 and 604 both had issues where the button would stop working well. The new G502 X models have a new mechanical click that feels amazing. Very much like a mechanical keyboard as far as consistancy and feedback. Not every button has the same feel, but they all feel very tactile and reliable.
- Great battery life - I can get 3 weeks on a full charge at 1000 hz poling rate. Don't bother with smaller polling rates, as when the mouse isn't being used it's not a power issue, and when it is in use, it's still not a huge power issue. You might get a few extra days at best, but if 3 weeks isn't enough charge time for you, I'd be shocked.
- USB-C charging - Sad that this is still a plus, but USB-C cables are so much better. Glad we're finally starting to no longer see Micro-USB cables.
- Works Wired - Forgot to charge it? You can use it wired, or use it while charging (Either works).
- Great sensitivity - The mouse is so adjustable, I found I could turn it down from my usual DPI and get both great responsiveness and accuracy with a near default config.
- Customizable - Logitech G software has flaws, but it does allow some pretty good versatile configurations. Every button can be remapped and remapping can be done on a per-app basis.
- Logitech Support - I've had multiple issues with Logitech mice long into their service but under warranty, and Logitech has always been easy to work with to get a replacement or help. This sounds like I'm saying Logitech has a quality issue, and I'm not, I know stuff happens, particularly with high use products, so it's good they stand by them.
Cons:
- Large - It's not a small mouse, so if you have small hands, it could be a little large for you. It also means it's not easily portable, though honestly mice aren't that large in general, so portability isn't a major concern, and you can always get a mouse case if you travel a lot and want to protect it.
- Logitech G Software sucks - I mean, it does OK, it can auto-sense games, you can copy profiles, but it has several general flaws, including if it detects a new game it generates that game's default setting that you CAN NOT CUSTOMIZE ahead of time. If I have a known default mapping/DPI setting I know I like in most games, why can't I make that the default? Also, making button changes and navigation of the US is very unintuitive. Like one of the worst UIs I've worked with on a major brand's software. It also by default likes to spam notifications that is harder to turn off than I would have liked (Otherwise, every time the mouse gets touched, you get a windows notification or 3 about the mouse and DPI changes). Their old software (pre 2015) was easy to use, and worked in the UI was nearly the exact opposite of this. Fix your software Logitech!
- No backup gliders - Not a deal breaker, as I know I've not had a mouse with glider issues in the past 10-15 years, but it would be nice, particularly on a gaming mouse where if the pads wear it could be noticeable for some. I don't need stickers Logitech, I'd rather have a replacement pad set.
- No pinkie rest - Some mice have a nice pinkie rest that helps you relax your hand a bit. This mouse does not. That's definitely a personal thing, and honestly most gaming mice have moved away from this due to weight, but with a large hand, I like mice with them.
Overall, it's a great mouse with a lot going for it. I'm enjoying using it, have found my hand/arm feel better after a day of using it vs my old mouse, and love all the features it offers that I can look past any small shortcomings.
Who do I recommend this mouse for? Artists who need finite DPI control. Office workers who want a bigger mouse (there are cheaper options, but it's a solid productivity mouse). People who use their computer for a significant time. Casual gamers. Competitive gamers who want an all in one mouse. It's a good mouse for a lot of use cases, which is why I'm giving it a 5 star review. It's not perfect, but very few products are, and it's strong where it needs to be.