I think Divster did for a while, but personally Ive never found the shakes filling as such. Stick with it just now, this is the worst time in a VLCD. Keep drinking coffee/tea/water, itll pass
And besides you dont want to go through your shakes too quickly
Yes I did 4 packs, and then did 3 packs and lost no faster!
Research has found anything under 800 cals is classed as a VLCD and if you have 400 cals a day or 800 cals a day the weight loss is the same!
If 4 makes you feel better it will not impact your weightloss at all. The only thing is the bumper pack is not going to last a month, but as its cheap enough it dont really matter too much