I would definitely recommend this product if your baby has a sensitive digestive tract or is having a bout of diarrhea and the regular formula is irritating him. My baby was having diarrhea and we called our pediatrician and she recommended this. After a couple of days on Isomil, he was back to his usual routine (consistency et. al). The bad side of this was the price but there are $5 coupons out there. Combine that with a sale price and a store coupon it comes out the same as the generic store brand.
Similac Advance-
My daughter could not keep her formula down for more than an 15 minutes. After trying several other brands, this is the ONLY product that helped helped her- and me! :-)