I stopped by Cafe Ollin today, on 108th between 1st and 2nd, after reading several posts here about it, and their cemitas.
I ordered 2 cemitas - one Milanesa (breaded beef) and the other chorizo. They were out of chorizo, so I went with spicy pork instead. Wow - what an excellent sandwich, particularly the Milanesa!
They are on the spicy side, and definitely on the large side. I found the Milanesa to be a spicier than the spicy pork - perhaps the breading on the beef soaks up some of the pepper and other flavors and helps concentrate it. They have slivers of avocado, bean paste, lettuce, tomatoes, onions, chipotle pepper, some papalo, and warm, stringy cheese, all sitting inside a soft sesame seed bun. The papalo makes the sandwich, IMHO - it, along with the chipotle, gives a smokey flavor, offset by the sweetness from the tomato and onion.
The people are friendly as well. I'm definitely looking forward to my next visit!
339 E 108th St, New York, NY 10029