Subway doesn't actually understand the concept of "Reuben Sandwich". They don't even have Thousand Island as a condiment choice. Subway's Reuben is to "Reuben" as White Castles are to "hamburger".
Still, allowing for the goyim, it's an okay fast food sandwich. The corned beef was okay (though not great) and the sour kraut was sour if not krautish. I played a bit with the extras, leaving out many of my usual additions so as not to stray too far from the original concept. If you don't have dressing, mustard will do.
This has been a gratuitous "here I am at the computer when I should be outside on a gorgeous day" post from Baron Dave. Oy vey.