I am going out of my way to share about SecondLayer because I really want it to do well and stick around. It is awesome. I just left a review for it on the app page. But in a nutshell, it allows you to take quick, unobtrusive micro-surveys from your potential buyers and learn so much about them! It's a very minimalistic and beautiful user interface, and the data we are gaining less than a week has been sort of flabbergasting. We are learning so much about what our people want from our store. And we are already making those changes.
I think this is the best app we have used so far, maybe tied with Exit offers (which pays for itself x 10 every month). I think this app is similar in the returns we will get from this data. Plus our browsers know we really care about what they want.