The concept itself was very interesting (and I'm in marketing). That's why i decided for this product. So far there are no major issues with it; everything seems good but that could be my own fault because we've been using only 5 weeks now so maybe during our free trial time more bugs will appear ;-) But overall all things seem fine - except from few days ago when they changed their business model towards "Pay what you want" which turned out bad at first time cause people were paying too much money than expected by them :/ Maybe next version should have fixed price options instead.