Opinion about blade sharpening service

[Bowwild]

I wouldn't use such a business.

Someone who might need such a service should find someone to work with them to show them how to get the edge they want.  

If patience is the missing ingredient, that might be more difficult to fix.

I have to admit, I've had no difficulty all my life getting shaving sharp edges on my broad heads and knives. But, I have more trouble with a single bevel than I thought possible.