I am a CEO of a venture backed iPhone game developer and we used Virool extensively to promote various trailers of our games. I have experience working with multiple ad networks including: AdMob, Flite, Flurry, TapJoy, AdWords and others.
In my opinion, Virool tops them all. First, the transparency of the platform is hard to match. Second, real-time analytics allowed me to adjust my campaign settings in real-time. Third, customer support was always available. When I had problems, I would just call Scott and he would help me set everything up.
I would highly recommend them.
Jake, thanks for your ringing endorsement. It's always a pleasure to see our users enjoying and benefiting from our service.