Like everything else, BFL is what YOU make of it. If you can only work out twice a week, fine.....five years from now you will thank your lucky stars you are at goal weight....WITH a great metabolism. Two full-body workouts per week is more than adequate. Theres a reason 200 lb bodybuilders have to eat 6000 calories a day just to maintain, I just wish I learned that 20 years ago.

There is a big Curves thread on the exercise forum, so check it out. Their training is based on circuit training, so yes 30 seconds on each machine is fine. Then later on you can do a 2nd circuit and so on.

The hand and ankle weight thing is a gimmick, so don't bother with those.