I was wondering which seat folks tend to prefer - the single seats on the left, makes it like an individual lounge chair I guess, or the more industry usual 2 abreast window seat. I've never had the experience of the single seat, though I've tried the herringbone "suite" on CX.
Overall I feel the E190 give you the least Bang for Buck when it comes to Executive Class. The seats are not that much bigger then Economy. Economy is only 2x2 as it is. No hot meals, lots of occasions where they don't have enough real coffee mugs.
As I have to pay to upgrade my fares from Tango plus to Latitude if I want the chance to upgrade I will rarely shell out the dough if I'm on a E190.