I'm not sure you can get to Cappadocia from Istanbul by train. I know the
train goes to Ankara, but then I think you would have to take a bus. It
took us about 12 hours overnight to go from Goreme (in Cappadocia) to
Istanbul by bus. The ride was very comfortable. In Goreme we stayed at the
Ufuk Pension, which was fairly basic but we enjoyed it. The Ufuk owners
also run a good restaurant in Goreme village. If you are taking a tour in
Cappadocia try to include the Ilhara Valley; it is spectacular.
Ann Widdowson Victoria, BC