Once you try the pig mac, you'll keep coming back and back and back and well you get where I'm going here.
I've been able to have Papi a couple of times, once at a food truck Friday night and another time at a South End festival. My most recent visit to the truck was today at Sycamore Brewing's Spring Fest (4-29-17). Still good as ever, if not BETTER.
If you see this truck in your hood, drop whatever you're doing and get in line. Order anything and everything, prepare to be delighted.