realskiers

I work in a shop that has new (bought new 3 years ago) wintersteiger machines and a ceramic stone edge  grinder (and the greem hot wax machine).  The guy who runs the machine (Phil) is in his early 60's, a great skier and has been doing race tunes all around America since the late 1960's.  He's meticulous, fussy, and skilled.  When I get the 'full-tune' from Phil, my skis ski better than when they were new.  Most of the junior racers won't go to anyone else.  I'd trust him with any ski.....

Make sure that the shop you go to has a 'Phil' running those fancy machines and not some easily distracted teenager or college aged 'dude' (for give my ageism....but experience has taught me it's a fairly reliable assessment).  Talk to the technician and get a sense of how good and knowledgeable, and steady-handed he is. 

The new machinery is great....but it requires a skilled user. 

FWIW-The ceramic edge is more important than the grind and yields bigger improvements in how an older ski skis than any other tuning procedure...in my opinion.

Liam