I am a Joomla beginner and have only just started working with extensions. Like many others, our site was plagued with spambot site registrations and we wanted to eliminate them. As I am not completely confident I know what I'm doing yet, I always look for the reviews that say, EASY. (no good when it comes to troubleshooting a problem)
I had this plug in installed, enabled and working within minutes although I have not looked at the additional features it offers yet. Very grateful to all you clever techies for sharing.
No spam in Joomla! with ECC+ for sure.
Have fun with Joomla! and no spam!