I have been drinking them at home... and I will agree they keep you full for a long time (so full that I usually am not hungry for lunch). But my consern comes with the energy part, I don't do much at home that requires a lot of energy therefore it's hard to test it... and if I drink them and then work out, like always I wanna sleep and I'm still not hungry... but I know that just in general when I go to disney I dont get that tired, I usually don't get that hungry. I was just curious because anyone I could possibly go with doesn't eat breakfast, and I was just trying to find a good alternative. Its probably between the instant breakfast and fruit. As for getting like Energy Bars or anything like that, when I can buy a box of instant breakfast for the same price as one energy bar... then.. its not worth it to me... I haven't cared much for my body.... so I'm nt that worried about getting in the right about of proteins or anything...