The component is great! Very easy to install and configurate. Very easy to import comments from the other components because the import system is universal, just need a little knowledge of SQL. And if you don't know SQL, the support will help you or answer any other questions.
Important that there are many different styles, so if you don't know CSS, you can just choose the one you like. The other components hardly are able to boast in this. You can also change smilies :)
Definitely worth the money!