No, I've not tried them (not actually ever heard of them!), but a quick google shows them to be a meal replacement diet. Is that about right. I found this:
Nutritional Information Per 100g Per 50g Serving Per Day 150g % RDA energy kcal 400 200 energy KJ 1676 838 Protein g 27.6 13.8 Carbohydrate g 38.6/ 19.3 of which sugars g 28.6 /14.3 Fat g 13.4 6.7 Of which are saturates g 6.1 3.1 Linoleic acid g 3.549 1.774 fibre g 6.8 3.4 Sodium mg 548 274 822 Potassium mg 2186 1093 3279 164 Calcium mg 660 330 990 124 Magnesium mg 275 137.5 412.5 110 Phosphorus mg 574 287 861 123 Chloride mg 685 342.5 1027.5 129
It's a table which doesn't copy and paste well but I've bolded the relevant carbs. For me, 60-odd grammes of carbs ison the high side. I wonder whether there is enough substance in two shakes and one meal to fuel your day?