I have to echo the chorus of people very pleased with the AS box set. Some pleasant surprises for me: the 3151-era primer, the fact that the buildings have tabs and slots for glue-free assembly, the practical advice on terrain creation and scale on pp. 8-11, the additional objective/scenario ideas on p. 7 (which are variations/simplifications of ASCE scenarios, but not totally identical), and the AOE and movement type markers (although I use colored dice for ground/jumping/sprinting, having a marker with no number on it for standstill/immobile is nice to have).
Not sure if there is going to be errata for these quickstart rules, but I note that immediately after stating that 4' x 6' is the standard table size on p. 7, the rules on p. 8 depict a battlefield that is 5' on the short edge.
One question: the sidebar on p. 10 states that papercraft buildings are available on the downloads page of this site. Does that just refer to the buildings in the back of the old quickstart rules that are currently available for download, or is there a plan to post the templates from the new box set so we can print additional copies?