Hi all,
Wanted to report my experiences with my G602 mouse (Primary mouse before XIM4 so I decided to keep using it). I didn't know it was listed incompatible until I had a slight sync hiccup today and decided to check. (Bluetooth wouldn't pair, I DC'ed the receiver and it paired right up)
Outside of today's slight issue I've had no other problems, gameplay is smooth and responsive and the device has no issues picking up the mouse. Is wireless interference one of the reasons it would be listed as incompatible? If there's another potentially bad reason, let me know so I can stop.

The issue I had was that after downloading the XIM4 manager update, it wouldn't actually sync with the device. Tried power cycling everything and then re-pairing with Bluetooth and that's where it decided to error out when trying to pair. I removed the mouse receiver from the XIM and it instantly paired up and XIM4 manager worked fine.
Hardware: XIM4 duh, Logitech G602 wireless mouse, El cheapo Logitech keyboard (K120)