Speedy's is on 4th Avenue between 59th & 60th Streets. I went there a few years ago on a recommendation from this board and liked it a lot. I checked it out again this past weekend. Since my first visit there, I've traveled to Oaxaca, so I was very interested in the Oaxaqueno tamale on the menu. While the tamale didn't particularly remind me of the tamales I had in Oaxaca, it was incredibly good: steamed to a velvety perfection and fiery spicy.
My dining companion and I also tried a quesadilla with corn fungus -- I forget what it's called, huitcochle or something like that -- which was good enough to get again, a taco al pastor, which was fine albeit short of sublime, and nice watermelon juice and horchata.