I'm on the same bus as Capricorn. For me failure was not an option! - I have gone slightly over my syns on two possibly 3 occasions. All down to error rather than poor planning, mis-calculated or forgot to write something down.
I used to worry about other people, but then I realised it doesn't affect me what they do. A lot of people visit the group I go to as a social event - that is their choice and their money.
Just because I can't be that way, doesn't allow me the right to judge them lol. We're all different I guess.
One person's negative perspective might be another person motivation etc.
IN my 25 week SW journey, I have gained twice and STS a couple of time too I think. I've always stuck to plan though.
My main weapons for this is to quit alcohol and avoid eating out unless I have a massive control.