This is another example of why to do great science you need to do great engineering. The original group rushed to publish the paper without polishing the details, and now other groups are struggling to replicate their results.
There is apparently a whole bunch of controversy with the paper being published by one of the authors that had been allegedly kicked out and wanted to ensure he was credited as an author. The other authors were apparently still working on the paper, production methods etc but this unauthorised early publication derailed that.
