Joomla - Extending user registration fields

[Complainer]

Any Joomla heads out there? I'm using Joomla for a community site, and I want to add some extra fields to the user registration process. I've come across a few options, but I'd love to get some first-hand experiences.

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http://extensions.joomla.org/extensions/access-a-security/authentication/2034
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Thanks in advance.