If you're in one of the big languages on SO (C#, SQL, Python, Ruby), it's terrific.
If you're trying to get help with some other language, I've found it to be far worse than mailing lists, IRC, or even USENET. In less-popular languages, the only questions are of the form "How/Should I learn $(lang)?". There's no Jon Skeet of Haskell there.
If you're trying to get help with some other language, I've found it to be far worse than mailing lists, IRC, or even USENET. In less-popular languages, the only questions are of the form "How/Should I learn $(lang)?". There's no Jon Skeet of Haskell there.