Does the Total Gym really work? I'm trying to lose about 60 to 70lbs in 1 year?

I just bought the Total Gym XLS. I'm trying to lose 60 to 70 lbs in 1yr. I just wanted to get serious opnions from other people that have tried the Total Gym. Did it really work for you?? How many times I week did you use for? How many pounds per month did you lose?? I know it comes with couple of DVD's and the workout flash card, and I know everyone is different but what workout segment is good way to start or is it better to use the flashcards? Is it possible to lose 60 to 70 lbs in 1 yr? I'm just trying to look for suggestions and maybe some different ideas as how to use it??