I've had my '01 B15 SE (with PP) for over 10 years now and I can honestly say I love the car. It is solid on gas in the city and pretty good if highway driving. My car has only ever sipped premium fuel and I have taken care if it. I had 225,000 km on my car before I blew the motor because of my stupidity. Before that happened it drove just about as good as the day I got it. I just changed the original front suspension at 230,000 Km but it wasn't really neccessary. I still have the original rear suspension on the car. I also STILL have my factory original Clutch setup with over 240,000 Km on it and it still holds even with an SR20VE in there since march. You have to watch out for rust on the bottom/inside of the doors and paint/stone chips on the front bumper/hood.
I can also happily say that with CAI/Exhaust and advanced timing on my RR motor (back in the day) I used to spank my Civic SIR/ Celica GTS and Integra type R buddies. They could never believe my torquier 4 door grocery-getter could beat their no power till 7000+ RPM cars.
But ya, it's pretty decent on gas if you drive it with civility.