I've owned two of these. They're very nice: comfortable, responsive, good battery life, lots of buttons, mostly placed conveniently (for a right-hander). Both mice have developed the same fault: the middle-button click function has become very hard to make. It now takes a significant amount of force to get it to work, enough that I expect that I'm flexing the circuit board. This might be as simple a problem as dust in the contact, but it's not a user-serviceable item.
The first mouse lasted about seven months before I returned it for a refund and bought the second. I've had the second mouse for about 20 months and it's been getting progressively harder to work the middle click for the last three or four, so I'm contacting Logitech for a refund/replacement again - it's got a three-year warranty, so I hope they won't give me any hassle. Assuming they refund rather than replace, I'll probably buy another one and see how that behaves.
Edit 10/1/19. Third mouse has gone exactly same way. Now completely non-functional after 11 months.
| Brand | Logitech G |
|---|---|
| Product Dimensions | 5.8 x 19.6 x 13.6 cm; 263 Grams |
| Batteries | 4 Lithium ion batteries required. (included) |
| Item model number | 910-003823 |
| Manufacturer | Logitech |
| Series | G602 Wireless Gaming Mouse 910-003823 |
| Color | Black |
| Processor Count | 1 |
| Computer Memory Type | DDR3 SDRAM |
| Hardware Platform | PC |
| Are Batteries Included | Yes |
| Lithium Battery Energy Content | 1.23 Watt Hours |
| Lithium Battery Packaging | Batteries packed with equipment |
| Lithium Battery Weight | 0.8 Grams |
| Number Of Lithium Ion Cells | 4 |
| Item Weight | 263 g |
