Had rajas poblanas (a creamy chicken taco) and gallina de chocolate (chicken mole).
Rajas poblanas were amazing. One of the best if not the best tacos I've ever had, but it's more of a tasty chicken with a tortilla you can make a taco with.
Gallina de chocolate - not the best mole I've ever had. Solid flavors, good balance of vegetables, but the mole was a little more sesame/chocolate and less spice than I'm used to.
Guava margarita also pretty good but not spectacular.
Service, however, was spectacular. Attentive, multiple people came to check in (genuine, not just a forced question). I think overall a very good restaurant experience.
It's hard to have a high-end Mexican place, but Los Colibris does it pretty well. If not for the amazing service, I would say it could be a solid high-end but not fancy restaurant. But with the service this good, it could probably do well just to have a bit more creativity in plating.