Been playing UT2K3 for the last two days with my new MX700. Seems considerably more responsive than my first-gen Intellimouse Explorer. In fact, it seems to be TOO responsive at times, making it difficult to aim exactly in heavy firefights. I think perhaps I need to adjust the sensitivity, but I haven't yet installed the Logitech software (that stuff usually scares me).
It definitely kicks ass over my wireless Intellimouse at work (yes, we sometimes have fragfests at work...). The included 1800 mAh batteries seem to still push the mouse well after it indicates low-battery.
Hey Schwartz, nice KDS Rad5 you got there

Mine is hooked up to my Voodoo5 PCI, and acts as my second monitor. I just wish it could do 1280x1024, but whatcha gonna do...