I like these alot.. I only ordered the Green tea lemon and strawberry lemonade infusers to start.. I drink them with meals 2-5.. I haven't tried the shakes because truth is, I don't like the shakes either, but I drink the RTDs for convenience..
I do get the shakes and that nervous chattering feeling a bit from them, I cut out caffeine completely about 2 months ago when I restarted MF, and this week is the first time I am having caffeine again from the infusers.. I expect the jitters will go away soon.
I have more energy.. I am not collapsing and taking a 2 hour nap anymore when I am home from work, so that is awesome..
For weight loss, I don't know yet.. I haven't really been watching the scale to be honest.
The strawberry one is awesome by the way.. I find it is better than crystal lite, it doesn't taste nearly as artificial as crystal lite does... it reminds me of strawberry kiwi snapple actually, in smell and taste.
I like to freeze them and then put it through the ice shaver (blender works too), to make homemade snow-cones