I run an advertising network for Microsoft community sites (Lake Quincy Media), which typically servers
60 Million impressions per month these days. I'm been using CountryHawk to
provide geotargeting as a service to advertisers who want to avoid showing their
ads to users from certain countries, or who wish to limit their ads to a
particular subset of countries. Since implementing CountryHawk (and
BrowserHawk - see my BrowserHawk review),
I have not seen any noticeable performance degradation on my system, and the
advertisers who have taken advantage of geotargeting have been very satisfied.
What else can I say? It just works. In addition to the product's features and
usefulness, I can also attest that cyScape's
support is very responsive and helpful, as I did have some questions for them
regarding a unique application configuration I was using.