Watched the 149 put on a rather spirited display along with EC175 & X3 which I personally thought was brilliant.
As said 189 basically a civil 149, was unable to get to the podium as it was invite only however the interesting thing seen was the 4 rows of seats with what would be the middle seat of 5 missing in rows 1,2 & 3 to allow ingress to the rear and front.
Was told the cockpit will end up similar to that of 169 for commonality figures quoted were 145-150 cruise but as we all know when you start hanging all that crap off the outside it will go down and projected radius was 140nm with a full load with a Cat A departure at each end.