>>1330642In my experience, if you're going some distance NX is generally about the same price as a rail ticket. The train's slightly faster, but going via coach you're guaranteed a seat, power & wifi and (crucially imo) you can take more baggage. All things being equal I'd prefer a train trip, but NX are better for groups or families
Plus, on the National Express, there's a jolly hostess selling crisps and tea. Bah bah-bahda, baaah, bah badah...