This is technically the third XP8 I've had my hands on, one in the store and the other has been installed but isn't ready for final programming yet.

Anyway...

The system consists of four RK3 keypads and three T2C remotes, all controlling different zones.

The EQ List:
VAUX 8x8 lattis audio switcher (232)
Rotel amps
B&W speakers
One pair of Martin logans w/sub
Polk XM tuner (IR)
Marantz ST7001 Tuner (232)
Rotel CD player (IR)
2 Escient FP1 iPod docks (network connection)
D-Link switch (big one!)

I had no issues with the volume control via 232.

I used one of the "sense" inputs on the XP8 to do a source equipment OFF macro. Works beautifully!

I love that fact that I can do RS232 without the expense of a CM232 module. The 232 library is so easy to use it makes me want to use it as often as possible (where as, in the past I avoided RS232 when I could).

Programming the XP8 via the network connection (including over wireless) might be the best thing since sliced bread!

Overall I have ZERO complaints, and can't wait for the two way communication. Just so I can continue to challenge myself.