Haste also generates reasonable output (it can be debugged, though it is nothing like as reasonable as purescript) and has a runtime that is only 500 lines of straightforward javascript. It had pretty haskellish runtime semantics (purescript doesn't) I was able to use my existing tools like hdevtools, and have what (with just a couple ifdefs) functions as a single code-base for client and server. But its community is just too small, its updates too sporadic. I couldn't see building a business on it. Purescript or Typescript would be the only compile-to-javascript languages I would consider for serious work.