Seekfast works very well as an application and it saves me SO MUCH time looking for information within multiple directories of documents. I used it daily at work to save me a lot of time from manually guessing which file had the info I need, and then manually searching through the document for what I'm looking for.
1: The indexing process is very fast, it'll process a directory and many sub-directories full of files very quickly.
2: There are 16 categories of file types you can filter by
3: The search results are returned in a manner that makes sense. Seekfast will return a list of files matching your search team, below each filename is a list of places in the document where your search term was found, at the top of the list are places where it was found verbatim, following that the list will show results where your search term is used in context, so if you search for "root access" down the list you'll find "root-level access, "access requires root account access", etc.
4: Here's the cool part, if you click on a line from the search results, the app will load that line of text and all it's surrounding text from the document so you can see the greater context. It does this in the app, no need to open the document itself.
5: When you're ready to open the document, just click on the document filename in the search results and it will open in your default application for that filetype. Review collected by and hosted on G2.com.
The back button isn't mapped to a keyboard shortcut, you have to click the back arrow icon. Not a big deal, but I wish it was the same keyboard shortcut as found in common web browsers. Review collected by and hosted on G2.com.