Sounds like you're a good candidate, but the laser techs will be able to tell you with more certainty since they'll see you in person.
What's killed with laser stays dead; it may not kill everything, but it's a good start.
I had it done over five years ago now and have only a handful of surviving hairs, and no, there's no "shadow" once it's all dead. That shadow is the hairs growing under the skin; no hairs = no more shadow.