Hydroboost is a nice change. The only thing I don't like about mine is that the power steering pump will moan softly like it is being over-worked. It isn't very audible but it is there. I know there isn't air in the system because that sound was a bit different and went away after a while. I read somewhere on this site where someone had sourced a better PS pump that eliminated the noise but I can't find the thread.
I will say there are times I wish I had ABS. With no other changes to my braking system, this one clamps like crazy.