Well, it's not an engine out job for the 1.8, so you're safe there. As far as reliability goes, most of the problems are niggles. Had a 1.4SX for four years without a single murmur of a problem. Other people have had no end of problems. Some have had a few problems they can put up with.
Don't be put off by some of these recent surveys either. The problem with some of these surveys is that they don't put across reliability of these cars across very clearly (any car). The JD power survey for instance is a prime example. A car gets rated even further down if the owner doesnt like the styling for gods sake. (if someone doesnt like the look of the car why buy it?) These surveys take into account stuff like dealers (we all know about Fiat dealers), aftersales, ride, performance and stuff like that and the overall satisfaction of the ownership experience. If you boycott Fiat dealers and take to a good specialist or independant garage you should be fine. If you don't mind a firm ride you should be fine.
A few years ago Lex did a survey on reliability - Fiats came out near the top with 11.0% of cars breaking down. That was above BMW and Mercedes. (Alfa, Renault, Ford and Vauxhall were way down with 40% plus breaking down) The Punto was one of the more reliable cars they had. The Bravo wasn't as high as the Punto, but still made a relatively good showing, save for the few electrical and teething problems of the original cars.
But back to the original question - if you get a well looked after, properly maintained car, there's no reason why it shouldn't give you excellent service but buy a neglected, abused Bravo and you'll be shelling out for it on a monthly basis.
regards,
Paul