We like it, and the four other adults and two children we've been with have liked it. But it isn't "Tex-Mex" (Don Pablos, Taco Bell - not a taco, fajita or chimichanga on the dinner menu - and the burrito and enchilda platter really seems to be an afterthought to appease the people who came for a burrito). I haven't been to Mexico, so I can't speak for its authenticity. We've had fine service and great food there twice.
Check out the menu and see what its like. You will get conflicting reviews on this one (but then even restaurants nearly everyone loves have their detractors, and even the ones few people like have someone who thinks the food is wonderful).
Added:
BTW, the lunch menu is very different and appears much more Tex Mex - with tacos and flautas and tamales. I've only eaten dinner here.