I received a sterilizer as one of my baby shower gifts. I used it only once. Personally I found it time consuming. I read that as long as you soak your bottles in hot soapy water you should be fine.
So that is what I did and still do, I soak my bottles in a plastic container (Sofia's first bathtub from the hospital...lol) for a while before I wash them.
You will notice that everybody will have different advise. This is what works for me.
Dree