I installed it a while ago, but their demo has a time lock on it and I just had too many projects going on when I tried testing it then and when they gave me a second code too. I never really got around to really testing it at all. Funny you should ask about, I just finished deleting all the files from my server last night.
From what I recall, my sense was that it wasn't as intuitive an interface to work with and because I need to write a bunch of special code to handle the specific needs of my site, I am more comfortable working with perl, than in C. For reasons I don't want to go into, I can't use include virtuals for SSI and I can't change the ad banner code on all my pages to include the region, so all this has to be figured out by the script. I think the features were pretty similar and I got advertpro on a discount they were running for $100 off that ended at the end of last month, so I figured it's worth a try. Their support has been great so far, I even got a great response from them when I was considering purchasing it.
Jerry
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