Other than that, we are very happy with what CiviCRM provides. The other so-called "CRMs" in this category on this extensions.joomla.org don't even come close to what CiviCRM provides.
> CiviEvent to create online event registrations - customize the registration form to our needs
> Donation payment system with builtin PayPal (it has others too) payment processors - we just had to configure it with our paypal info
> Member/Volunteer registration with customized fields - our Joomla account creation link redirects to the CiviCRM member account registration page (btw, CiviCRM also creates a Joomla user account for each registration if we want to)
> Volunteer management to assign tasks to volunteers, etc.
> Maintain contacts
We researched many other systems, but none had what CiviCRM provides.
Oh, did I tell you that the support is great, yes it is. :)