I have hundreds of arches completed using InstaRisa protocols, I utilize the denture designer inside of 3shape with presurgical records, I combine implant coordinates and provide a prototype via the WaxupBridge path to combine my presurgical wax up and convert to a fixed hybrid. I have made for myself a library using the InstaRisa parts to use it inside of 3shape but honestly the Exocad path may be easier for most non power users.
We still use Exocad for the vast majority of our alignments but I can design much nicer and faster patterns in 3shape so I have developed my own path to the finish line. The InstaRisa system is much more than just a facial scanner, its is exceptionally versatile set of concepts to add to what ever cad system you want to use to be very creative with your designs, but most importantly it WORKS when used correctly.