In this case, Balint provided EXCELLENT support.
Recently i bought (almost) all of Balint's virtuemart extensions and had the following issues (NOT bugs)
1. Balint went his way to changed the coding for Ajax Dock Shopping Cart (please check it out) without additional costs
2. Balint help resolved a CSS issue for universal ajax search for virtuemart (not his scripting problem).
For those of you wanting to buy his extensions, please go ahead without worry of after sales support.