Have been using this network for 6+ (?) months now on my blog [1], and I've been amazed. The current CPM is well higher than what Google AdSense used to give (at least many years ago), the ads are non-intrusive and of great quality in the tech niche (rather than the sadly common scammy banners from major networks), and it does not spy my visitors, which for me is an absolute priority.

[1] won't spam since it's unrelated, but my profile page contains the link if you want to see a simple placement