We have been using EBP for just about 5 months now and have nothing bad to say about it. We serve over 1 million banners everyday without issue. The software tracks every impression and click. Easy to setup, easy to install, and the support is out of this world.
If you're looking for some banner serving software, you can't go wrong with EBP. You may contact me for details of our use if you would like more information jbosco [at] nexteramedia -dot- com.