The ability to use it with other frameworks, like Laravel's or Symfony 2 is amazing! It has been really easy to integrate into our application as well. I have yet to find something that i dislike about this software; however if you're looking at using PHP in any way shape of form, then do not hesitate on trying out koalaframework. We are solving an issue where we needed secure access points within our code without having too much security risk involved as there were many problems related to file permissions when dealing with authentication systems built on php alone (like login).