I had previously used extendedreg for my customers' site but upon upgrading to Joomla 2.5 I decided I didn't really want to pay the upgrade fee and it's a reasonable amount of work to add custom fields manually! I would have given USERXTD and excellent rating but I did have an error relating to components/com_content/includes/css not existing! I created the folders and it works fine!
UserXTD is a vary complex component, so we need more time to debug and make it perfectly completed.
If you meet any problem or bug, please report on our support forum(have to register), help us removing all bugs, thank you: