When implementation is finished correctly a live feed is activated on the Nosto web admin panel, displaying products customers currently shop on the site. Immediately after the implementation or while testing the live feed might not display images correctly as it takes few seconds for Nosto to process the image. Use debugger on an erroneous product page if you expect otherwise.
It’s easy to get amused with the feed, but it’s not time to relax yet. While Nosto is currently doing number-crunching, analysing the visitor behaviour and building a replica of site’s product database, nothing is yet live and creating value for you or shoppers on the site.