AdForm is a simple DSP that doesn't pretend to be more than it is, which we like. You can run, monitor and optimize campaigns based on a variety of parameter and include segments matched to pixels, which is great. The company is also very international.
The company does not seem to be industry leading whatsoever and we are a little curious as to how its bidder actually optimizes and makes decisions. The black box magic is not explained well enough.
Its worth checking out especially if you need international reach.
Running ad campaigns for large and medium sized clients, the benefits directly we have realized would be renewals, an increased ROI and the ability to target European countries very well.