In my opinion, there is more than one type of Woody Allen film. There is the antic lunacy of films like Bananas and Sleeper, the serio-comic "serious" film with "meaning", like Annie Hall, Husbands and Wives and Deconstructing Harry and then there are what I think are Woody Allen's "love notes", if you'll bear with the expression, films like The Purple Rose of Cairo, Bullets Over Broadway and Sweet and Lowdown, films as a general rule that are period pieces (generally the '30's or thereabouts) that are basically mash notes from Allen to something Allen particularly cares about, such as jazz in Sweet and Lowdown (specifically jazz guitar and Django Reinhardt). The score is great, which is typical for a Woody Allen film. Allen does these little films vey well and they are almost always worth watching. Sean Penn plays a self-centered, egotistical creep with talent. I will leave any further interpretations regarding the preceding statement to the Gentle Reader. Why he was nominated for an Oscar escapes me. Samantha Morton, on the other hand, gives a sweet, if almost one-note, performance, which basically sums up the movie: worth the time and effort to watch, but a one-note film. If you like this side of Woody (and I do), this is worth seeing.
Review of Sweet and Lowdown
