Good in it's day, hopelessly out of date now.
The graphics, to me when I was a kid, were quite cool with 'vividly' detailed otherworldly landscapes and the idea of controlling a train as it hurtles toward oblivion, switching tracks, never taking the same route twice seemed amazing. The music too was minimalistic, but has inspired quite a few trance remixes in its time. Almost completely made by Antony Crowther on his own, then still a teenager as far as I believe, it's 'impressive' that kid with a C64 program book could make a whole game.
Also released as a slightly different game called Black Thunder, Suicide Express is now really just a game that belongs in a museum. It's an antique and so badly dated that it's almost unplayable today.