A lot of times, the food blogger in the house is the uber-planner - that knows days or weeks in advance when we're going to a new place. Other times - we're just out and about and decide - hey let's go there!
I think the other thing to note is the variety - they have so many kinds of Reubens! Whether you like turkey, brisket or heck - how about two potato latkes instead of rye - they have a Reuben for you.
Why Should You Go? If you're looking for some authentic NY deli things like a black & white cookie or Matzoh Ball soup - then you need to go. I really enjoyed the Reuben as well.