I am working on a new site and needed a vertical menu scroller for sub-navigation. After reading about the others I chose Pro Accordion Menu, and it was the perfect choice!
I had a problem with it not showing the contents correct placement on the site, emailed the company and they had it fixed within an hour.
problem was me, not setting it up properly, not the module.
This is an A+ company, would happily but another one of their modules.