I use a combination of the features – but use it almost exclusively for long-form PDFs.
This being said, one of the key-features for me, remains the multi-PDF view. The ability to be able to drop extracted-highlights of text from PDF-2, PDF-3 and PDF-4, onto the note-panel of PDF-1 – and then to be taken back into PDFs2-4 from the note-panel of PDF-1, is incredibly useful.
I frequently need to highlight lengthy pieces of legislation/statute – and depending on the jurisdiction, I might be sitting with the “master” piece of legislation, that has been heavily amended by new legislation. Using the multi-view, means I can highlight the text that has been changed, and then draw in the text from the new legislation onto the note-panel of the original legislation. Given that these all serve as “live-links” to the new legislation, it becomes very easy to review the former/existing text, as against the changes introduced by the new text.
No other app really comes close to how easy/well LiquidText handles that aspect of things!
One other feature, is the highlighter “summary” view. To be able to tap a button, and have all the other text contract, to only show a continuous view of all the text that has been highlighted, was something I didn’t know I needed until I used it!
Whilst I appreciate the effort/care they have gone to in setting up the various Exporting options – this remains my only sore-point, in that over on the Mac/wherever else I am ‘viewing/consuming’ my PDFs, doesn’t allow one to experience it as it is on the iPad. This sees me be fairly selective about what I use LT for (in terms of which PDFs go into it), as opposed to making it my ‘general/overall’ PDF annotator.
My one major wishlist item, is that they expand the highlighting quick-select options to 7 choices, as opposed to the current 5. But I realise I am an outlier in this regard, and manage well-enough with how things are now.