Since I came here I've tried about 5 different salons. The one I was most happy with is JOCARILMA. It's on la 27 de febrero, centro comercial Jorge #5.
It's a mini centro right before you make the right on la 27 to go the el Pola supermarket. It's next to Magnacolor. The owner Dona Carmen is real knowledgable about hair. All the ladies are really nice. Check it out, you won't regret it.
A new place--quite modern--just opened up on Calle 11, close to Bon on Metropolitana.
My own favorite is a woman that has been doing hair in this area for 40 years...
She operates in back of a tiny Italian restaurant on Calle 11, across the street from the side of La Epoca. Her name is Mechy....
Mechy is by far the best. She doesn't just style (which you can find on every corner), she also does really great cuts and color. The salon also sells great products as well. Hands down the best here in Santiago.