Re: powder or concentrate?
I think it's whatever one works best for you baby that matters most. DD does best on powder, concentrate made her very fussy and caused her reflux to act up (that's the form of Nutramigen WIC provided too so we can't use it). So if your baby does great on powder then go with it, it's cheaper. However if lo doesn't, then try either a different powder or go for concentrate or rtf!
Happy Wife and Mom to a crazy hyper boy born 7-11-09!
and a wonderful daughter born 5-3-12