It is a small museum as mentioned but has some nice displays. The E8 has plexiglass paneling on the side you can see from the street, so you can see what the insides look like. I was there about 2 1/2 years ago, and the Mohawk had gotten a paint job.
Another nice feature is that it is right next to the NS Main line. I think the original NYC waterlevel route. So you can see real trains going by too.