Almost ashamed to admit it, but I was in Puerto Natales for two weeks last fall (spring down there) working within sight of the Balmaceda Glacier, across the street from the Sondo Ultima Esperanza, and didn't get in a single day of hiking. Due to national strike, labor was very hard to come by, and the three days I had built in to hit the Torres and Cuernos got eaten up. It is truly unbelievable unless seen, and a trip not to be missed . Except apparently, by me.
Main feature here is the Balmaceda, from a distance of about 100km. Behind it hidden form view is the Torres del Paine, Cuernos Mt Fitzroy etc etc etc.