So far in this thread, there are several comments that could be the grounds for substantive discussion, but don't bother offering the substance. For example: Why does jonbarker recommend Anki for going deeper than "complete beginner"? What does zealsham mean by Duolingo lacking a "structural syllabus" and why is that problematic?
The conversations can be a very valuable part of HN, but not if most comments are at the level of "I still find their spaced repetition lacking" with only the tiniest bit of elaboration. Hopefully I'm not out of place in encouraging something more substantive.