I started off with just diet changes, and once I was able to stick to that for a month I started looking at excercise options. In the mean time, my 17 lbs I lost in January got my mother inspired. She had lost 99 lbs about 5 years ago, and this last year due to many many emotional issues she gained about 50 of it back. She decided to get back to where she was and so we joined a gym together. I dont' think the weight is coming off any faster, but honestly I look better than when I did 5 years ago 60lbs lighter. The clothes sizes are dropping pretty fast though, I'm almost down almost 3 pant sizes so far. From what I understand from my doctor cardio is the main thing that's going to get the fat off, and I make sure to do that 5 days a week. I started off with just 3 days, but now I'm up to 5 days of cardio and 3-4 days of weight training. I started at 30 minutes of cardio and have worked up to 45 so far. Its a lot of time, but I think its made a HUGE difference in how I look and feel.
The weight will come off faster at the beginning, I lost 17 the first month, and 12 the second, and I'm only at about 3.5 for March but its all about sustaining it