The best thing is that they are very friendly to work with! They have helped us improve our website conversions by using some great tools for tracking all of our pages in one place. We were able to see which ones performed well before we made changes versus after making them. It's been amazing so far!! I can't think of anything negative at this point but it would be awesome if they had more features available as an add-on or something similar down the road (perhaps even paid options). Our overall goal was increase sales from organic traffic only; therefore funnel envy came into play because there isn't much information out there about how you set up your account in order to get started optimizing funnels effectively. Also, their support team has done wonders - always quick responses when needed! Definitely use these guys! In my opinion, no downside here yet :) Their main focus is increasing revenue through SEO/SEM campaigns where people find us organically first instead of.