we were hesitant to try it b/c of the "bad reviews", but did so this past october.
we really enjoyed it!! the food was very good (& i've traveled to mexico repeatedly), definately
not reminiscent of taco bell, IMHO lol . atmosphere is one of the best & most authentic in WDW, very romatic

. our server was very pleasant, & efficient.
the only "bad" thing i've noticed (on more than one occasion, unfortunately) is that the hostess(es) have a tendency to loudly berate the staff, & be rather discourteous to guests (not us, so i did not feel it would be appropriate to speak up

).
just our opinion

, but we find San Angel a much better experience with better food than the revered LeCellier (which is okay, but a bit too mundane for our tastes).
hth
