Their creative capabilities are top notch. Their ads blend seamlessly into all native environments. This is especially powerful for agencies looking to make a positive brand impact. Their reps are especially communicative and easy to work with and are proactive at suggesting optimizations.

Their UI was very straightforward and spit out the "tag" in a format that could be easily uploaded to AppNexus.

Design! They focus on the design and the creative side of the native ads which tend to be very interesting these days. Their platform is self-serve but I have to say it does the necessary things you would expect. So they're not far from being great.