Cancer treatment is one of those things that falls under individual preference. If someone want to go an alternative route, that's fully their decision. And right.
One can get conventional treatment and do well, or they can get conventional treatment and end up bedridden with very little quality of life. Same goes with other therapies. For me, it'd be a matter of quality over quantity.
Having watched my father go through chemotherapy, I think I'd give the baking soda a try first. He died within a year anyway, with lungs full of holes that couldn't hold air anymore and spent more time in the hospital, than out of it. I don't want to go through that.