Looks amazing (if a little moist...) I've been wanting to do Crib Goch for years now!
I remember doing it when I was at school, and I've always been a bit nervous about heights. I only really completed it then because there were people in front and behind me, so I had to go on! I don't think I'd do it again.
As I recall it wasn't really difficult at all, just what is referred to as a bit exposed, ie you edge around a rock with your feet on some convenient bits to support you, over a thousand foot drop if you put a foot wrong!
I've been up Snowdon several times since, but only via the easy paths.