Been using them for about 6 years now. Tried others, but always returned to Ibill. Signups and rebills especially are much better with Ibill than with the others we tried. The $bottom-line$ is what's most important to me.
We've never had any problems getting our money. Their tech support used to suck big time, but has gotten somewhat better within this past year.
To summarize, they can be a royal pain in the ass sometimes, but the $$$ makes it worth it, to me.
