I stumbled across the DVD of this while at Disc Replay today and my buddy asked me if it was any good. I had seen this one twice before and enjoyed it both times. It’s kind of a bit of a slow burn but it’s suspenseful enough to keep you engaged. I also think it’s pretty well acted by the two leads. I’ve always been into movies like this anyways. It’s not perfect but it’s pretty good and worth checking out. Plus it has a wicked twist at the end which is always a nice surprise.

Sounds like Hitchcock's "Strangers on a train"