Does the Tracey Anderson Method work for severely over weight people?

I'm really interested in trying her program, I have found some mixed reviews but that's to be expected. The problem I'm having is, the people on her commercials are already small compared to me and have some exercise routine. Where as I'm 5' 7" 270lbs and nobody on her commercials look like me. I'm wondering if this program only work for those that already fit but need some extra help. What do you think? I would love your advise, please no negative comments I already know I'm over weight, thanks.