Nice review from Blade Magazine.
https://blademag.com/knife-collecting/knife-aid-review-scary-sharp-or-just-scary-seen-on-shark-tank
https://blademag.com/knife-collecting/knife-aid-review-scary-sharp-or-just-scary-seen-on-shark-tank
It would be interesting to see how this service compares to the results a new user gets from the $50 or $70 powered Worksharp models.