I started with BL around January 20th this year. For the first 6 weeks I was a little skeptical about the quality of leads although in my first 2 days I began working with a seller with a home valued at around 900k, their listing will be live by around middle of July. I am only working with sellers.
I currently have 4 sellers I am working with and expect to see a further 3 turn into listings giving me around 6-7 listings this summer from my leads.
What I like about BL's is the quality of information which I am provided with and the speed at which that information about lead is delivered to me. It has taken me some time to get a handle on the funnels and that is still a work in progress due to the number of leads I have coming in but I really like the way I can edit the funnels to suit my needs!