First off, congratulations on your results and I'm so glad you're happy with the grades you got!
I'd say it's worth noting that even when you appeal, the grade can still stay the same - I appealed one of my A level grades a few years ago that I was a couple marks off and it didn't change. Also, if you're happy with your grades and don't need it for university, then maybe it isn't worth it! But, if you know it's going to eat away at you knowing it might change (this was me), then go for it!