Just to touch on what N.RotaryTech said...my FD's been running a half-bridgeport since '05. Its been daily driven, raced, beat on, everything you can imagine. Aside from chunky off-idle response, it can be daily driven with no problems. If the ports are done correctly they won't eat seals. IMHO there's nothing like the powerband of a well-sorted boosted bridgeport.
As far as mileage is concerned, I see 15 mpg city and have seen up to 23 mpg on the highway. Not too far off from a stock FD.