Optifast

I know you can't just walk into a pharmacy and purchase Optifast. I went on the Nestle website and they have a list of clinics who will prescribe and sell The Optifast to you. When I browse these clinics online, they "seem" to have quite an extensive pre-screening system and tons of practitioners (physiotherapists, nutritionists.... etc) on board and I'm worried it would be a long involved process to just do the 6=week Optifast program.

Does anybody have any good reviews about any of these clinics? One where I can nicely be in and out with my purchase?