When I lived in Stoke I did go by train, but from where I live now it would either mean at least two changes on a round trip three times the length of the road journey, or using park-and-ride from a station that's as far away from me as the NEC itself. On a weekday, the latter might be worthwhile to avoid the queues, but not at the weekend when I can avoid them anyway by parking at the station.
Mark