I have been working with iProp for about 4 months now, they are very professional when it comes time to make any changes or adjustments as far as campaigns go! They're always quick at responding back if you need anything answered in real-time so that's great too! The only thing I wish was different would be more flexibility options regarding billing cycles etc., but there really isn't much else we can say because everything has worked out well thusfar.
We were looking into using Google Adwords/Adsense advertising which could potentially bring us some revenue from our site. It also helps keep up brand awareness by having ads displayed throughout other websites (like Facebook).