I was a relatively heavy Hackpad user (still using it, actually) and have been beta testing Notes&#x2F;Paper for a while - it started off very Hackpadish, but has evolved a bit, enough that it may actually be suitable for my small company to finally migrate off of Google Sites.<p>For me, the biggest missing piece for Hackpad, and why it was always a non-starter for any serious knowledge collection purposes was its lack of hierarchical structure. A few weeks ago, Paper finally added support for folders, which while still a bit clunky&#x2F;not-ideal (the sidebar doesn&#x27;t give you a tree nav, there&#x27;s no way to see the whole structure), it at least meets that minimum bar for organizing say, more than 20 notes.<p>I haven&#x27;t done much group collaboration work (the teams&#x2F;org stuff was just introduced, and honestly, the thought of Dropbox completely messing up my&#x2F;my coworkers personal Dropbox accounts terrifies me - the horror stories posted in the thread don&#x27;t help assuage my fears, and I am not sure I have a conceptual understanding&#x2F;trust of how Dropbox models accounts&#x2F;teams), and while Folders have permissions, I can&#x27;t figure out how to assign&#x2F;inherit permissions (crucial for working with clients, contractors), but on the bright side, it&#x27;s not literally insane like Google Sites&#x27; permission system (it involves modifying global inheritances to give access to specific sub-trees).<p>In most other ways, it is like Hackpad++ - mostly like you would have expected it to evolve: great feeling typeahead search, instant editing, OT-based multi-user editing, and improved&#x2F;extended embeds, and adds annotations, which I can see being conceptually pretty useful.<p>The biggest thing missing for me now is offline editing - it&#x27;s not strictly a requirement for our office use, since that&#x27;s online-only as well, but there are so many times traveling&#x2F;offsite where it&#x27;s a huge pain. The other things are mostly niggles - ways to actually see the site&#x2F;document structure, the option to attach files (especially images) w&#x2F;o them being directly embedded, a way to view&#x2F;track embeds&#x2F;media&#x2F;files only, but overall it may be the best wiki-like app out there for small groups now, especially those that hate traditional (modal editing) wikis.