Anypoint Platform vs Data Masons EDI

There aren't any, I mean it's a little pricey, but totally worth it.

Studio is still need some work. some times it is slow when you work with flow properties and diagram

It was expensive to use at first, until we fine tuned it for our specific needs.

There are a few quirks but nothing that can't be worked around. I understand that many of them have been addressed in upgraded versions.