A thread at Digital Point forums named Searchfeed.com Experience sums up several people's experience with SearchFeed.com. The review is primarily of publishers explaining that most of the clicks are values between 1 to 2 cents, but that SearchFeed.com is honest and pays on time. Aaron Wall, in the thread, explains that with the second and third tier PPC companies, you need to be more worried about click fraud, as an advertiser.
The overall impression I received from the thread was that people were happy with SearchFeed and they just hope it paid out more.
Forum discussion at Digital Point Forums.