G602 is quite comfy for claw grip users and the button layout won't affect the comfort of your thumb at all, your thumb stays clear from the side buttons.

Battery life is awesome and mines running on one battery now and it should last me about 2 months I think. I'm running on endurance mode so battery life is longer but I use this mode for gaming too, didn't noticed anything wrong with it. And oh yeah, the mouse accepts 2x At batteries so you can control the weight of the mouse too.

I love the texture on the mouse too, keeps sweat away and much more tolerable than my G400 or MX518.

PM me if you want to know the best price you can get!

Or read back my previous replies in this thread to get a direct answer

Logitech G602?

Super awesome wireless mouse that behaves as good as a wired mouse, as good as my G400 IMHO.

Switching DPI is quite easy, there are many other buttons which would be good for MMO/etc. Ergonomics is very good, as comfy as G700/G700s, battery life is super duper awesome.

G700s has terrible battery life, I've heard a few days only, some less than 1 week. Most extreme one, less than 1 day lol

I'm on 1 battery now, been using it for like 1 month already, on endurance mode left around 50% battery life. I think 1 battery can get around 2 months battery life.

As for performance mode I'm not sure since I'm always on endurance mode, no issues with gaming whatsoever, playing Dota2, fps, MMO tarak issue at all

G700s has very sucky battery life according to many people. Some say a few hours already mati, some say a few days...

Why don't you opt for G602?

I have NEVER EVER accidentally pressed the buttons on the left side of the mouse. Your thumb rests at the bottom of the buttons nicely. Logitech did a good job in this aspect - comfort and usability.