But the battery only lasts a day or two. The G604 is almost as nice, but battery lasts weeks. But it will likewise need switch replacements before long and is likewise no longer made. None of Logitech's current mice fill the same niche. Why do they discontinue their most popular mice without replacing them? Who can say. I'm pretty confident a direct 700/604 replacement with better switches would sell well.
> But the battery only lasts a day or two
Yes, but the battery is standard and easily replaceable.
My main gripe with the G700s is the weight, although it's not much heavier than the mx master 3. It also helps to have a great mousepad, or else I get tired of pushing that brick around. There are also aftermarket pads if you use it on the desk and they wear. I haven't tried any, though, my pads are still fine.