Contact CS, it all depends on what kind of service and what kind of products you use. I had the job lot done today, changed belts, engine oil, diff oil, gearbox oil, spark plugs etc. Depends what kind of oil and plugs etc you decide to use. Best to speak to Mitz.
I waited for mine and it took a couple of hours. If you are close then definitely go there, know the cars well and will look after you.