Running FXP v121 after I previously tried and removed v113. Have to say it looks very good and speed and battery are also good. Also the camera app is good oppose to older FXP releases I tried. All-in-all almost comparable to GB which means it's good enough to upgrade in my opinion due to the improved UI, task manager and ICS specific apps.
The only things that don't work properly as far as I know:
-HDMI output (obviously).
-FM-radio. App included (since v113?) but I can't get it to work.
-WiFi is quite unstable with frequent re- or disconnects, but useable.
x-Google Play has frequent connection problems = fixed by fixing permissions with ROM Manager.
-Flaslight in quickpanel doesn't work.
-Low in-call volume but still good enough when on highest.
-Home is still hard to keep in memory when using another laucher (Go Launcher EX). I used the latest Supercharger beta but still it is not as bulletproof as in GB. I have to say that Supercharger gave some Busybox issues (AWK error) which I couldn't resolve installing newer/older versions of busybox. I did follow the ICS guide in the Supercharger thread btw. So if somebody has tips then please let me know.
I'll stick to this ROM from now on! Nice work!