I have been using GVT for 10 weeks now on my chest days, I mainly do this because I work out at home and buying weights isn't cheap. I found it works very well for me and have gained about 1 inch in that 10 weeks. Also i had never been as sore the next 3 days after a workout, GVT will hurt for a while... trust me on this one. But if I were you I would read up more on it and work out what would be best for you. I'm not brave enough to use it on any other days because of the pain. It really isn't for people who aren't commited. But if you don't mind feeling sore then it does work.