Changing the ignition switch can be fun. You need LOTS of patience and a very good read of the Haynes first.
Locks will come as a car set and include the door ones too. Doors locks very easy to change. The boot can be a little more interesting but not too bad.
I bought a replacement car set from V.W and also paid for it. I havn't heard anything bad about GSF locks, except that they are about half the price.
If anyone else has heard bad things, say so now or forever hold your peace. (or piece, but not too tightly)
