There is some fun to be had with Vergil's Downfall-mainly the experience of playing as Vergil himself-but you'll have to ignore some of the add-on's own downfalls to be fully satisfied with this package.
Playing as Vergil feels and looks great; Interestingly dark plot does a good job of making this feel like a prequel (and homage to DMC3; Offers a single memorable boss fight
Frequent low-severity bugs; typos and glitches detract from overall experience; 2D animated cut-scenes fail to impress; Feels artificially lengthened; and doesn't offer much replay value