After playing around for a week or two, I've only just scratched the surface of what Painter11 is capable of, what I have learned, is, well, fun. the realbristle brushes are very cool, the hardmedia pallette is a nice touch, allowing you to create variants quickly, the real pencils too, are superb (particularly the 2b), the tilt control is great, feels natural, and you can't find that feature working so well anywhere else yet. I also really like the expandable mixing/picker pallettes, allows picking at a much more precise level. The colour management is good, flipping into photoshop (not sure about the other way around yet) is smooth, no more funky colour changes.
overall it's a nice piece of kit, no noticeable lagging on my system (quad 1.8, 4g ddr2 ram), the odd crash didn't bother me too much as I save regularly, but hopefully that issue will be regulated by updates, along with the brush skipping merrily now and again, I actually mapped one of the intuos4 keys as undo for this reason, frustrating little bug, but I'm sure it'll be sorted. It is resource hungry, cpu use was high, even at standby, but a very fun program to use, and while I'm not a complete convert yet, it's introduced me to a new weapon in my arsenal, once the bugs are ironed out I can see it vying for my attention.