I bought a few of the 2400 DPI model, and keep them for when my G400 dies. They were $13 when I last bought one. Obviously, you could buy several for the price of that Logitech G400S.
The two optical mice tend to get a lot of comparison, so I decided to do a head to head to compare. Includes a pretty thorough review of both the Razer DeathAdder 2013 and the latest Logitech g400.
Looking for the DeathAdder review? Head here:
Other Razer reviews:
Razer Megasoma 2:
Razer Manticor Mousepad:
Razer Ouroboros mouse:
Black Widow 2013:
The Logitech G400 performs flawlessly on all surfaces. We tried it on a solid mat such as the Razer eXactMat, as well a cloth surface made by Steelseries. We saw absolutely no instances of skipping or the mouse sliding around randomly. We tried a round of games, everything from a single player title such as Crysis 2 to a more fun Team Fortress 2, to a slightly more competitive Counter Strike: Source. The mouse performs without a glitch. You can choose to use the mouse without the drivers, but if you want to get the perfect customised sensitivity settings, you’ll need to play around with the sensor DPI settings, which means you’ll need the drivers.
Logitech still carries the G400S, but it's easy to see they'd prefer moving away from that more traditional design toward a more modular aesthetic and lots of flashy buttons to wear out. That particular mouse didn't even appear during my first look at their gaming offerings, as if it was "hidden." I had to find the Logitech G400S page through Google. And then there's the price. If you're ready to shell out another $70, they're a great design, no doubt. The G402 Hyperion Fury is similar, but less expensive. I'm still using the G400, but for how long? Shysters want over a $100 for one of those.