At last count, I'm pushing 160 deals on AppSumo. This is one that I am using more and more every day, and most likely should have bought the next tier. BYOK is a great advantage. It keeps the cost of the software down from an AppSumo purchase perspective and allows all of the extra features using my own key, which keeps my long-term cost down as well. Every now and again there is a little hiccup, but nothing that won't be ironed out over time. I do suggest you check this one out.