Hey, Zo! new play engine 4.1.5 just came out yesterday... downloading now... half gig program... quite an update...although just mucked around for awhile with the last version and it sounds fine and much more responsive...
Maybe it's finally maturing... definately a lot easier to use than Kontakt!
Spaces... are real spaces and just beautiful (all the grand piano locations, orchestral halls...and much more, listed accordingly) plus lots of stuff like real plate reverbs from EW studios... I got lotz of verbs and only use Spaces... listen to any of the ewql demos... like their orchestral stuff... or choirs... all use elements of Spaces...