I was asked to check out Flutter for a prospective client, as it appear to suit their needs. I was dismayed to find some bugs in what is undoubtedly a good plugin. problem is, for myself at least, the bugs would need to be fixed before I could ever use it.
Custom fields - the custom fields created are geat - except that their content is duplicated with the standard custom fields section of WordPress. this could easily be solved by adding an underscore at the beginning of the meta_names.
Textareas - I saw 2 button the Visual/HTML ones - but I didn't get the actual toolbar. Either this is a bug or I am missing something here. The links appeared to do absolutely nothing. Sadly this would be impeative for the client concerned.
At this time I have yet to test all the features.