[BonnieR]

Barb, it might be just as well that your sister is not on the computer right now. Sometimes one can feel bombarded with information and it is so much to process. It is wonderful that you are providing her this service. You can always trust the American Cancer Society or other established groups to give you information you can trust. They will talk to her on the phone too.
It's always a good idea for newly diagnosed people to have someone with them when they are in this decision making phase because we don't always "hear" everything being said nor think of all the things to ask. So it really helps to have an advocate in our corner. You can help her make lists.
As suggested, another opinion is always a very good idea. Big decisions are involved.
I believe that the standard of care is that Herceptin is best administered with chemo. I was offered to receive it solo but that is not often done. And I opted to do the whole enchilada. I had 4 doses of THC. Most receive 6.
Keep us posted and ask whatever you'd like. Someone here will have had the same experience.
Keep the faith.