I've stayed in it, the place is really good but make sure you're on a higher floor if you want to observe the trains from your room. You'll also need to be as far to the back of the hotel ( so ideally the NW corner ) otherwise you'll find the station wall restricts your view of anything coming from the south.
When I was there, the staff said enthusiasts who are guests of the hotel can use their car park to take pictures from as well - but do check that is still the case before you do it.