I've gone through about 20 of those coupons & they do a pretty good job.
Tell them to hand wax it, you have that option.
If you know anything about the tech side of things, just asking questions.
You should be able to tell if the guys knows what he's talkin' about or is a retard.
But since you're there, you should get a base grind if you need it & get your edges sharpened.
If whatever doesn't kill you, only makes you stronger.
Then I am so close to immortality