Easy to install. Lots of parameters for customizing. Think outside the box -- this component works for any type of content (like a list of services by category), not just FAQs.
I bought the component four months ago and today the developer sent me a notice of a free upgrade. With the new version, "publishers" can edit items from the front-end, so I wanted to upgrade. No uninstalling -- just install the new version and the upgrade seamlessly is complete.