Oooh we went yesterday!!!!!
Do you live nearby?
We live in Swindon so it was only up the road for us.
I loved it, so did ds and I would definitly recommend it. HOWEVER a few things to bear in mind before you go.
I think you need to be prepared for the 'shabbyness' of it, and take it that, that is part of the charm of it all. And that it isn't very long. We probably only spent an hour to an hour and a half there.
The actual train ride is only a few minutes as you only go 2 miles up the track, then you get off and go through santas grotto, which has been decorated by volunteers so isn't very plush or commercial. See santa, have a cuppa, and back on the steam train.
Ds did get a very lovely present off Santa though (It's £6 a child, and I would say that Ds'wooden Noah's ark was worth at least that).
We than had a cuppa and cake in the cafe on the carriage.
I loved it, but then I like the old fashionedness of it all!