I just installed a few hours ago. So far, GV is working fine (though I use it mostly just as a voice mail catcher.) However, it did notify me of a missed call. I haven't sent or received a text from it yet, though I rarely do that. My phone was already provisioned for GV as the voice mail provider, so I didn't have to dial that *72 number to set it up, but going into settings to set GV as my voice mail provider worked fine.
xtr cache2cache installed and seems to be working just fine.
I had those same "insufficient memory" errors on first sync/mass app install, but they all installed manually just fine. I did get a force close on Tweetdeck, but an uninstall/reinstall fixed that.
I love the Google/Cyanogen settings sync - all of my WiFi access points were ready to go. I wish all of the settings would sync, but the ones that do are good enough.
Ok, I'll give this a few days to see how it goes, and we'll see how stable/usable it is.