AutoVoto has a great UI and I use it on a daily basis. I'm also a fan of the "no strings attached" business model that they use. In my opinion, it's the best value-added app on the market today. They are always looking for new features and improvements, and their customer service is excellent. Their customer retention rate is among the highest on the market. If you're serious about growing your business and keeping customers happy, this is definitely the app for you. My favorite feature is being able to track how many times users click through each page in the application - so if you want to know whether or not someone will buy something from you, just look at how often they visit certain pages! Also very good idea using Google Analytics as an alternative way of tracking data.