If I currently had a use for it, I'd have bought it instantly!
I tested the demo, both admin and frontend, and must say I'm really impressed with this component.
The AJAX usage is very well done, reminds me of upcoming Joomla 1.5 for the admin.
It has ALL the options I'd be looking for for such a component, the best word to sum this up is WOW!
Think I'll buy it anyway.. ;)

Very simple to use: install, check the folders to index, and run. The search bot will then include the indexed PDF content! in search results and link to the PDFs. Very usefull feature.

I have converted my comments from AkoComments BK to Jom Comment very simply, all initial bugs have been fixed very quickly, the templating system is very easy to use (I customized the looks to match my site colors in about 5 mins!), and support has been excellent so far. All thumbs up.
joe

Seemed like a cool module at first, but I had to remove it as it was breaking my template layout on initial page load.
Using the modules +/- buttons fixes the problems, but everything is off again on every new page.
Needs fixing and I hope it will be fixed.

I'm using one of the now way too many "tweaked/plus/enhanced/whatever..." versions, and I would like to know if I can uninstall, keep all my comments, and install this version instead?
Will the tables be dropped, can they be updated (as according to features, you provide additional fields..) etc.
Would be nice if you could add some info to description here.
Thanks for your efforts.

I also liked the presentation on the site this is inspired from (mezzoblue, check it out!), thanks for making this so easy to use in Joomla! Installed, published, it works! Weel done.