The Thief (1981, Michael Mann)
This left me with mixed feelings. Most of the film was really good - I liked the cinematography (Michael Mann's eye for framing is really something at times), the neon-light neo-noir visual style, and the safe opening scenes were great. But then, there are also some questionable moments - the worst offender is, of course, that cheesy slow-mo final showdown set to a corny 80s guitar solo. Ugh. What a disappointing way to end an otherwise great movie.
Still overall I liked it a lot.