We were on Rediker for years, switched to FACTS SIS this year.
We like the one interface better in FACTS vs multiple apps in Rediker.
Still learning FACTS
We are also using FACTS SIS. We have been on the system since the early days of Renweb. The web interface is much nicer to use as opposed to the desktop application.
The great thing with FACTS is that it is built on SQL, so you can basically interface with about anything if you know how to do queries against the database.
The downside is that they might hold your information hostage and not help interface with another software if they have something comparable in place already.