Vipin Jain, CEO of Retrevo, talks with Vator.tv's Bambi Francisco on how his company's site helps consumers find electronic products and teach them how to use them once they've made a purchase.The shopping site has two rating systems: a value system that tells consumers where they can find the most features for their money and a sentiment rating that sheds light on what industry analysts and other buyers are saying about specific products."By combining the two, you can make a confident buying decision," Jain says. The company today announced a funding round of $8 million.