Easy setup, both on the iPhone and on a Debian Gnu/Linux server. I use it with Tellico, a cataloging program. Give a window and a widget on that window the focus (by clicking on it with the mouse), and the server drops the decoded barcode right in as though one had typed it.
The only criticism I have is that the setup instructions are a bit confusing. They should be numbered instructions: do this, do that, do the other. Not everyone has 25 years experience with Gnu/Linux.