iamntz: I'm concerned about the annoyance factor when you want to enter a literal digit. It can already be pretty annoying having enter and the arrow keys overriden.
Hmm... Yeah, you are right.
Instead of just numbers, you could use a modifier key + a number.
Anyhow, i found that the regular time (50ms) is very short, most time i can't type the snippet+tab and i get the auto complete. I increased the time to 4-500ms i think, is better. So if you enable this by default, you may want to increase that time.