First, "JS," Calgary gets something like 200 days of "sunshine" per year. One of the sunniest cities in Canada. And even in this wet cold summer we've been having, Los Chillitos; patio has been open since May. In a year with a normal summer they'll get close to five months' use out of it- great patio.
The food is superb, close to the best REAL Mex I've had in Canada (best is at Las Tortillas by Marlborough Mall). I always get the carnitas tacos- Los Chillitos absolutely knows how to do pork! Don't bother with the beef, which is the coward's choice for tacos anyway. Pork ro chicken, or fish when they have it.
The beans are absolutely amazing- that authentic, almost soupy refried bean puree that you get in real taquerias all over the US. Best refritos I've had in this country.