At the very beginning I had to challenge with 2 main problems:
1. Extension supplied own layout - to adapt it to my current layout view I needed to modify it. Additionally I use VM only as a catalogue so my standard layout needed a lot more modifications.
2. 'Live module' problem - selected products did not appear in the module.
Thanks to very helpful support it had managed to solve the first and other minor issues.
When it comes to the second main problem - unfortunately despite the support efforts it still exists. Despite many attempts, set up the site from the scratch and various settings the 'live module' doesn't work properly. VM restricts somehow the module operation...
Besides, the extension works as it should. It has very friendly comparison table layout and useful multilanguage feature. Thanks to template override there's possibility to exclude some VM categories from comparison.
Generally the extension is a very good idea for products comparison but it has many shortcomings. There's a lot things to do.. But the worse thing is the developer stopped to improve the extension - (last update on Oct 17, 2012). Why??
We've just updated DJ-VMPageBreak with a fix related to the VirtueMart latest version. It fixes the issue you mentioned.
Thanks for using and your review!
More details about the update: http://dj-extensions.com/blog/dj-vmpagebreak/dj-vmpagebreak-updated