Really enjoying my first ICS experience I have to say - it's not a massive improvement IMO, but rather a gradual improvement much like GB was over Froyo - it's certainly more intuitive and usable than GB. . . . It's hard work re-finding everything for the first time though!
One thing I'm missing from Launcher Pro on Apex is the ability to assign individual swipe gestures to a dock icon - on LP I had the dialler as a dock icon, with a swipe to bring up contacts - Apex seems to just have generic swipe gestures?
I can live without it for now, as I realise Apex is still in Beta.