i really like them - i've tried all 4 flavours. they're about 2.95 so they're not cheap & i wouldn't consider them as something to replace a chocolate bar (mainly because if i want chocolate, i want choc & would rather have a fun size bar than a substitute).
but...i do like them & they are quite filling. i don't stick to the times of day they suggest to eat them, just eat which ones i feel like
they're better than a lot of protein bars if you're on a calorie-controlled diet because they're quite low cal (around 136 for each bar), as well as low carb & low fat. some protein bars are quite high in calories & still high in carbs.
anyways, i'll stop yapping now - but i think they're definitely worth trying.