I recently had a Specialized BG 3D full fit. It was a recommendation from the bike shop pro. for optimal performance which I am getting out of my Carbon race bike. While most shops can FIT people sufficiently using common sense and some tools - the BG Fit process utilized time lapse video, dedicated software, body ergonomics /measurement and practical advice regarding a range of cycling nuances which I had zero idea about. The largest improvements in what I was doing previously were in the area of riding position & discovering body length differences/anomalies, gear which now actually fits the first time around and not wasting more dollars on personal experimentation. In short - this new bike and I feel matched and working in near-perfect unison.

As per the afore-mentioned bike store - pushing product / service without a logical ground makes very little sense. I'd walk out.

Essex