Great report! These look like really nice little aircraft. I reckon the E170/175/190/195 aircraft are the most comfortable narrowbody aircraft to fly on, as they have 2+2 layout and in my experience always seem to have decent seat pitch, but these look like they will raise the bar further.
I'm really struck by how large the engines appear on this, almost in the same way that a 777s engines seem huge (though obviously scaled down to the smaller size of this aircraft). For example:
https://pbs.twimg.com/media/CmSgCZrW8AE-ngP.jpg
http://i2.cdn.turner.com/cnnnext/dam...xlarge-169.jpg
https://i.ytimg.com/vi/PRM-NAj63g8/maxresdefault.jpg
It just *looks* powerful - like the little jet airplane who could!