Spirit; isn't that the airline where it's "pay for potty"?
Well, it's just that at the several Hbf's I've had occasion to be in while in Austria - €,50.
Otherwise, considering Crescent's timekeeping of late and the "if you've seen one Pine Tree, you've seen 'em all", scenery, I don't think Amtrak is worthy of your business.
However, as I recall, there is one "notable feat" of railroad engineering between Slidell and NO - the longest curve in the US, which goes around Lake Ponchartrain (source: AAR "Quiz: American Railroads"). Obviously, the curve is very slight.