Rated 5 out of 5 stars
Pro: it can auto-create structure and filters are easier to access via toolbar button. (unlike Download Sort)
Con: ASF doesn't have per-filter memory, thus "it's root or nowhere" problem with most sites with unstructured URLs - like on xyzTubes and "thread only" subset of phpBB forums.
Proposed solution: to extract data from current page's elements the way SiteDelta does. This would easily catch Tubes' categories and forum structures even on most unknown phpBB.
Bug: currently help claims (\w) to be a word, but in fact $1d from it gives only 1 word character; (\w+) works, though.