I had digital perm once. I think it's pretty good. I am scared of really curly hair... So digital perm -> large curls suits me
It wasn't that expensive.... I think it cost me $115 (before tax & tips) for medium length hair.
I had mine done at Chura. Not bad. But I don't mind to try another place if the result is better. (e.g. like Nam's)
I don't think it last longer than regular perm. I think the draw back to me is sitting 4 hours at the salon.... bored...