While these products are a great value, we need to realize that they aren't the be-all-end-all of your link building efforts. I've gotten SO many questions from people that can't seem to rank for their terms despite using the highly revered backlink packets.. when I answer their questions and offer advice they're always incredulous, claiming "but I'm using Angelas! Every marketer on the entire website says they work for every type of website every time"....
And to illustrate that point, I invite any and all of you to provide me with a case study/example of a site that's ranked with these packets alone for a competitive keyword or keyphrase. (no goarticles or similar, I want a root domain or subpage).
Now, before the flaming begins, remember, I'm not knocking the products, I said they're a GREAT VALUE. I'm just saying they should be used in conjunction with other, STANDARD link building practices.