My girlfriend has flown to BOS twice since B6 started the PIT-BOS route. Still can't try them because the flight times are wrong. We generally need a PIT-BOS in the evening later than 6pm, not the comparatively useless 2:40pm that's there now. (A morning flight can also be useful, but the midday flight seems pointless except from an aircraft utilization point of view.) The 7:30pm BOS-PIT is good timing. Since US has a 8:xx pm PIT-BOS nonstop and a 7:xx pm BOS-PIT nonstop, they win, sadly.

If the loads are good perhaps B6 will consider adding such a flight. So far that has been the main impediment to trying them.