If you're expecting to wait while they fit a new clutch, possibly also with a new flywheel if that is implicated in the problem, I suggest you go prepared for a long period of unparalled boredom.
Take a book. Some water. Maybe a tent and some survival rations. Don't forget the sunny smile, pleasant dispostion and willingness to lose many hours of your life when you could have been doing something productive. Remember to nod approvingly when they tell you the car is half stripped, but they don't have the correct part because there are so many different variations.
Unless you go prepared, you can look forward to whiling away the hours memorising the battered copy of "VW Driver" in the waiting area and wrecking your guts with the awful coffee on offer.
Myself, I'd take the courtesy car, even if it is a shed.
p.s. In my experience, every single VW dealership is strategically located as far away from a pub as possible, so you can't even nip out for a half of shandy. A pity.