I have heard a lot about how good private networks help in improving SERP, but I have always been skeptic about using them as a main stream link building method. The reason behind this is there are plenty of users who uses such network and spam them to death with spun content. If this was 2009, then I would have given it a try, but after Panda update I'm more concerned with the quality of content.
1) What are the best private networks according to you?
2) Should I use them to point directly to money site or should i use them as tier 1/2/2 of link pyramid/wheel?
Hoping to get the best advice from experts.