We attempted to use Dynamic Converter on our 3dcart site. The results were not good. The Converter caused the price display to be blank on the home page Featured Products and on the Category page. The conversion display did work properly on the actual product page, cart and checkout pages.
We had several exchanges with DC support and were making some progress, but they quit responding after several iterations.
It was not a plug-n-play integration, even with the 3dcart specific instructions, and would have taken some significant CSS and html changes on our particular site to make it work.
It's a nice feature and it may work better on some sites and would be worth a try.