I've been sitting on this one for a while now, waiting to make sure it's the real thing. It is quite good.
I had the great pleasure of working nearby for this past semester, and of the many things I enjoyed about La Villita, Los Barrilitos belongs right up there La Chaparrita, though much more scaled down. It was often a struggle to pick one or the other. Indeed, it is rather fitting: if you reflected La Chaparrita west across Kedzie, you'd land more or less right on top of this place. Divine, really.
As the sign would indicate, they take their tacos al pastor very seriously here. As the sign also indicates, the trompo is about the size of a small barrel (excuse the crappy, sly cell phone pic):
They had just finished pulling a lot of crispy pork off for a sizable order--tortillas covered the griddle to the left--so don't be fooled by the apparent plainness of the trompo.
Wednesdays and Thursdays, tacos cost only a dollar, though only three varieties are offered: pastor, asada, and cabeza. On other days, chorizo is available. The menu consists exclusively of tacos. Today, I had three: two al pastor, and one of asada. The latter is quite good, but the former are excellent.
This next pic better captures what I love about these tacos. As with a fine example of shawerma or gyros, these are thinly sliced, so that they curl up a bit, along with the trademark striation.
The flavor on these is pretty solid, even ignoring price. Slightly sweet (pineapple juice? achiote?), plenty of toasty bits, even a noticeable cinnamon note. A red, somewhat hot salsa and a green, slightly creamy one are served, along with limes and this mix of lightly pickled onions and very thinly sliced habaneros:
I liked the wafer-thin slices of pepper, as they really helped customize the heat, being easy to pick out and appropriately dose your tacos. Salsas are perfectly good, but I only used a dab here or there. I've also had the jamaica a couple times--pleasantly strong-flavored, but a bit sweet.
Anyhow, I hope some others among the LTH world can corroborate my uninformed opinions and poor photographs. With La Chaparrita being closed on Thursday, just head west off Kedzie instead of the usual east, and I think you will be duly rewarded.
Taqueria Los Barrilitos
~3518 W 25th St
(North side of 25th St., just east of Drake)
Chicago, IL 60623
(See pic above for various phone numbers)