Before I try Kunena, I installed some others free forum components. I admit that Kunena is the best far from the others. Great layout, looks like the forums we are all used to and not just like a sloppy layout. Easy to use just install and everything works out of the box. I could even find my language (Greek) in some forums with (almost) everything translated.
If you look for a free forum component do not look any further. This is the right for you. It is very well developed.
I highly support all the free extensions but I would like to have the option to remove the "With the support of Kunena". After all if someone sees the layout he would definitely know it is Kunena made.
I will change some thing in next version.
Thank you for your feedback