Shark's Tank falls short because it doesn't have the same kind of dialog as either the BBC or CBC dragon's den. The depth of analysis the dragons go into is great and can really help entrepreneurs understand how to get into a good business.

There was a CBC episode or two where some software products were shown and one of the dragons had a background in software and he loved the idea just for being software. I don't remember anything special about the particular product, but 100% margins were the topic of conversation.