Upsell.com ‑ ReConvert Upsell

I added this app a few days ago, and though I'm still getting the hang of a couple aspects, much of the setup and process is easy to understand and accomplish. But even more impressive than the app itself is Stilyo's customer service; I had a number of questions initially and they were incredibly quick to respond (whether by chat or email) and just as helpful. I really don't think I've come across an app with better service! Let's hope they develop more apps for me to try...