Thanks for the reply - had a look at their site, and with nav links not working, spelling errors, and SEO as their primary product, they're not selling themselves to me as a publishing network.
Your call I guess Brian, but I use them. However, I use them now as a 2nd tier to take unsolds from my new ad network partner, adsmart.net, I've actually been acheiving around £0.40CPM with this guys.