Yeah, root is a piece of cake, it's one click now or at most a couple of ADB commands. ICS root is much the same as far as I'm aware.
The initial ICS Update caused LOADS of problems, but Asus have managed to sort most of them out. I've just had mine back from RMA for the reboot issue (it's randomly rebooted again once already, but I'm hoping that was a one off) and it only took somewhere in the region of 5 days to repair. Time will tell if it's still a problem.
I'm a little soured by the debacle of the ICS update, but I still think it's a pretty good piece of hardware and would recommend it albeit with a little caution. It's well made and feels like an expensive, quality piece of kit and if you ignore what happened with ICS, I've no issues with it whatsoever.