Whenever I wanted some mega-obscure Japanese or Thai movie, Netflix never had it and Blockbuster always did.
Oh well.
I meant to give it a try once I ran out of interesting movies to watch on Netflix. But I guess I waited too long, because now they're out of business.
Despite Netflix not having absolutely everything, I think Netflix still has a really good DVD selection, with plenty of relatively obscure films (along with tons of mainstream ones).
It could definitely be better (on selection, and also wish they offered more letterboxed and full-length films instead of shortened ones), and I wish there was more competition in this field. But overall I'm pretty satisfied and would recommend their DVD service to others.