I was at Colonia for vacation, I spent some days and I went for luch over there:
-Nice waitress and hostess,
-The food is bad, not nice at all
-A snail is faster than their service, try to go with lot of time
-Watch out for bill check, try to pay with credit card instead USD - ARG, exchange rate is very bad
-Place is lovely
So, try to avoid them, even when they are friendly, is pricey food for what you get.