When I saw "Back to the Future" as a teenager, not only did it become one of my all-time favourite movies, but it also played a major part in turning me on to movie scores; I know a lot of people bought it for the two Huey Lewis cuts and the other songs, but Alan Silvestri's score was what drove me to get this. Both Silvestri and the score have many fans - there's actually a website petitioning to get the actual music from the movie released, as the 11 minutes or so on the soundtrack [the short main theme and the 8-minute "Overture" - basically a suite, mostly taken from the storm climax] aren't heard that way in the movie; the version of the theme over the end credits has a more thrilling ending than the album version, for instance. (I heard some sound clips of the Varese re-recording and was NOT impressed.)
The songs are okay, but nothing really essential; more of the score would have made this a 5-star release. But fans can take heart from "Romancing the Stone" [finally released after 18 years]... we might get lucky!