Cheerio is really really awesome. I've used it to build a considerably sophisticated web scraping backend to wrap my school's homework website and re-expose/augment via node/mongo/backbone/websockets.

There are definitely some bugs in cheerio if you're looking to do some really fancy selector queries, but for the most part it's extremely performant and pleasant to use.

If anyone is interested in seeing what a sophisticated, parallalized usage of cheerio looks like, feel free to browse through the app I was mentioning above -- it's open source: https://github.com/aroman/keeba/blob/master/jbha.coffee