When I went to Argentina, EVERYWHERE I went they had Quilmes, Quilmes, and more Quilmes. It wasn't just that this Argentinean beer brand was popular there, it was practically the ONLY beer on the menu. Others that they'd sell were Heineken or Stella Artois, but there wasn't a single place I encountered that did not have Quilmes!
I tried it and it was alright, definitely tolerable but nothing special. I might compare it to American Coor's.