After scouring the extensions library for a program that would allow me to build a user-searchable member list for paid-members only, I was pointed to CB. For my purposes, it seemed like overkill because I was not creating a social networking site and scalability concerned me. I have very rudimentary web-building skills; hence I use Joomla! and I was concerned that the CB component would cause problems for the site I built.
I installed it - carefully following the installment instructions and it works wonderfully. No glitches; no conflicts - just pure performance. I couldn't be happier and my hat's off to the team at CB for the fine product they created!