I'm not generally one for musicals - although I certainly appreciate the genre - heck, I even did an entire course one semester on The Hollywood Musical, which proved rather informative and quite enjoyable. It was nice to learn about something I didn't really know much about, something I hadn't paid much attention to in the past.
Then of course we now have Sweeny Todd. My first exposure to this being in Kevin Smith's Jersey Girl, and once I found out it has as it's tie-together-theme, essentially murder and cannibalism, my interest was piqued.
Pretty much, if you dig Tim Burton flicks - you'll no doubt lap this up. Sweeny Todd fans will also no doubt dig it, even musical fans in general will probably dig it ... even if it is all a bit uber-goth. Speaking of which, you do wonder how many 'goffs' were sniffing around this flick like it was the second coming, be they posers or not.
Anyway, amidst all the wonderfully drab and dark design, lies a slice of the classic musical...which in this day and age of *sigh* Never Back Down and all the other 'Fast & The Furious, but with...' popcorn escapades, is a nice change of pace.
Finally, I myself could certainly be labeled (one of many labels, surely) as a gore-hound - and this certainly taps into that vein. A horror musical with lashings of the red, red kroovy.