Why Jennifer Aniston hated botox?

Jennifer Aniston has admitted to trying Botox in a bid to retain her youthful looks, but says she didn't like the effect the injection gave her.
The actress, who recently hit the big 4-0, told Elle: "I tried Botox once and it was really not good for me. I felt like I had a weight on my head. I think it makes women look older. Harder. The warmth in their faces goes away. You see women and you know they’re not young, but you can’t tell how old they are. That’s what stopped me."
Source: So Feminine