[justinparus]

Had a G602 for many years, and then migrated to M720 triathlon. I like the G series ergonomics, but the G604 kept breaking on me. M720 has treated me well so far and support for standard battery cells is very nice.

[Perz1val]

What broke? You can replace the switches, stock omrons are pretty garbage and it's super common for them to break.

[alexk6]

I've replaced the switches in my G604 once, but I don't think I'd do it again. The internal construction is overly complex, so the process took far too long — even though the actual desoldering and soldering was easy. I just wish Logitech would re-release this model with decent silent switches and without the rubber coating.

[randallsquared]

Just want to plug the M720 some more. That mouse kept me going through years of work/personal computer use.