I have been on Optifast modified diet for 1 month now and I have to say, I'm hooked. Granted, it is extremely difficult to drive by fast food places or to watch friends and family munch on little snacks, but I feel like my goal is so attainable on this plan. In 1 month I have lost nearly 12 pounds! By the end of the summer, I am hoping to lose about 30-40 more. My doctor says this is extremely realistic.
The shakes, in my opinion, taste great. I have one for breakfast, one for lunch, and one for a snack. Since I am on modified, I am allowed dinner. I usually do a lean protein, like chicken or steak, with some steamed vegetables. If I'm feeling a lack of excitement, I grill the meat and veggies and use some 0 calorie dressings to spice it up. But overall, it's been pretty easy to follow. I have some fruit as a snack or a part of my lunch, and I really do feel satisfied.
Exercise is limited to light walking, jogging and biking. No weight training. This is tough for me because I want nice toned arms and legs, but that will have to wait! It's easy to do the light exercise though. Just try to walk for a half hour a day, and always take the stairs!
Feel free to personally email me if you want some more advice on this plan. I'd be more than happy to answer your questions.
Good luck!