Like many web sites, we wanted to have an "Ask the Expert" feature where the users could submit questions and an expert could give advice. There were a few things we really wanted to make this work well.
There were two modules that seemed promising, yet neither had everything. Adding the Subscriptions module filled in many of the gaps.
This had almost everything; it's biggest weakness was the inability to have a temporarily unanswered question. A simple hack could fix that for this application, but would also affect the other FAQ uses. A more complicated hack might be useful; but we would prefer official support from the module's owner. We submitted a feature request for this; perhaps it will happen.
According to the meager documentation, this module was actually written for this type of application. Unfortunately, that's just about all we could glean from that documentation.
Another concern was that there were some rather old (35 weeks) entries on the issue queue. This is often a big red flag for any module - no, or poor, support. It's not that we don't have the ability to dig in and fix things - it's that we shouldn't have to.
We finally decided to test both solutions. The following pages detail our results.