I also cheated after a week, I did cheat with Proteins, LOVE meat. I was so worried, and asked my doctor what was it that they were afraid of.
1. Throwing up (band moves)
2. Starting Digestion
3. Gaining weight
His answer was throwing up, they want the band to heal in place, more than anything. He said he didn't even care about the weight loss yet. So if it goes through and you don't get stuck....use your judgement.