Lipotrim isn't MUCH cheaper, it's bout £4 cheaper a month. I would recommend CD, as the choice of flavours/products is much better and they actually taste nice.
Seriously, Lipotrim tastes gross. The shakes are minging, and don't even talk to me about the so called flapjacks.
Anyway, that's my opinion. I did 2 on Lipotrim, and switched as I had just had all I could take of the flapjacks repeating on me during the day. Yuck.