Wow hurray! Getting that first stone award is a great feeling! Congratulations!
No, I didn't fall off the plan really at all when I was feeling ok hehe. I found it really pretty easy to follow and with so many nice things to eat I didn't really have that many naughty moments. I do love to cook though, so I think that also helps a lot. I think occasionally you can have a meal out and still lose very well, I would occasionally go out and have say lean steak or chicken and a jacket potato and it didn't affect my losses at all.
Keep up the great job!