Crowdflower's API is excellent in comparison. And the UI is much better to boot. We find it restricts the kinds of work we like to do too much - but it also r

Crowdflower's API is excellent in comparison. And the UI is much better to boot. We find it restricts the kinds of work we like to do too much - but it also restricts it to the kinds of work that Crowdflower can reasonably return good results on. So that seems like a good trade off. I recommend Crowdflower as a starting place to anyone thinking of using MTurk.