That's what my son uses and it's worked great. There's no reason it wouldn't be a good idea. My pedi said it's just as good as any other formula and it has worked great for Parker's sensitive tummy. It's not more expensive and honestly we buy the Parent's Choice brand. We get a large can for 14.00
Re: Similac Soy
We use Similac soy - pedi said it would be easier for DD to digest, and so far so good.
We shop at Costco - and it is about $27 for a 35oz can - which is the same price as Similac Advance