It's true that the documentation is extremely sparse. There are also a few "gotchas" in the program (which can be readily worked around)

1) The receiver needs to have a way to decrypt the text. Both users need to use the same password. This should be obvious and is fairly typical but ought to be spelled out in the (nonexistent) README file

2) you do NOT have to restart in order to usde this service!! Quit the installer from the dock menu, then log out at your convenience. The logout will ensure that the services menu is updated. Repeate: Restarting is NOT required (and for the installer to claim so is rude :-(

3) Note that the decrypted text will appear in another window (text isn't decrypted in place). Y9u can neither save from that Window nor copy the text (bad interface). However, you can drag the text (which is pre-selected) either as a text clipping or into a TextEdit or email window. So you can save it.

While I am not really happy about the problems mentioned above, at least there _are_ workarounds, the price is good, and I want something in the Services menu. I don't want to deal with AppleScript. So, I've paid and I will recommend SS with caveats.

Note to the developer - please fix these problems so the workarounds are no longer necessary and your app will be mmore useful.