Don't get your hopes up, US web site states, while the fleet is in transition seat maps will show FC but your flight might not have it. Also the true FC experience wont start until all of that fleet type is completed. So until all E170/175s are done, you might get a FC seat but don't expect other FC perks. Now Ih ave flown on UAX and AE RJ's in FC, its nice and I'm sure the E170's will be better.