We used these widgets on our new shopping site, everything worked perfectly. But we needed some special facebook relatd customization to bring uniqueness to the site. Cerontek send us a implemention offer with 24 hours which we accpeted. The customization was completed perfectly & delivered within 4 days. I am quite impressed with the level of support& professionalism from these people.
Not much to say on cons but they can add some more unique custom widgets to the collection in future.