I don't want to be unfair with the developer. I think it's a great solution.
However, It lacks a simple Menu Link with "User Access". It has menu links, but none leads to a simple login form.
Result of this, I had to use the Joomla basic login form with a lot of 404 errors while trying to connect with Profiler.
Maybe I didn't know how to use or set up the extension, and when I went to Profiler Forums, I found a message saying "Support stopped temporarly", So I didn't even try to write anything.
Anyway, as I said, I don't want to be unfair but although it looks great I couldn't use it.