This assumes a LocalTalk printer of some kind, not a serial inkjet. The install script did a good evaluation of my system, located the disabled extensions and panels, and updated everything that needed updating. The first restart failed as my desktop pictures were loading. The machine froze without finishing my Startup Items. The next restart was fine, however, as has been every one since.
Windows open a little faster.
One of my complaints about 8.0 was that its Finder windows took longer to display their contents than did those under 7.x. Your mileage may vary, of course. Not yet fixed is the column order in the Finder windows. A couple of shareware authors have tried to patch the Finder so you could arrange the column order, but they've not succeeded. The biggest time-taker was doing the tape restore.