LFE is a great tool I have been using it for a few weeks. It is def not for someone who has no idea about building links. I make sure all the content on each blog is different as well as the titles. I maybe do 20 per day so my site does not get banned. I have noticed increase in the SERPS. My site was on like page 100 now it goes from page 2 to 1 but I'm sure within the next few days it will get spot one. Also don't make this your only source for building links. Use articles, bookmarks, blog posts exc.