I like it fine, and at least it doesn't have a love triangle. Vincent and Winfield get to sing "Will the Circle Be Unbroken". You don't want to miss that, now do you?
Youtube has it in 10 sections. Part 1:
part 2, part 3, part 4, part 5, part 6, part 7, part 8, part 9, part 10
1000 Misspent Hours closes by saying that "It’s certainly no classic, but it doesn’t strike me as an outright failure, either." StompTokyo doesn't have much positive to say. Foster on Film says it's a "soul sucking, career-destroying joke".
Moria calls the movie "a travesty" and "a real Grade Z film" and calls Jan-Michael Vincent's performance "dull". They say,
Damnation Alley has been held up as the perfect example of Hollywood’s lack of understanding of science-fiction literature and a case illustration of what happens when filmmakers decide they know better.