Rated 1 out of 5 stars
needs better documentation - seems broken
the editor is very difficult to use - it inserts many spaces/indents at random when inserting a line break
i wrongly assumed you could set and save headers on a per-site basis like Mason - nope
no toolbar button
the regexp feature was planned and will be available since version 0.3.6 (currently in sandbox). The documentation you can get is at the first page of http://code.google.com/p/headertool . Where is also available the new "@regexp" syntax.