the good start formula by nestle is the best formula i have tried. it also have a very good rewards programs that gives you checkd every month or sooner for amounts of up to 17 dollards and if you purchase them at toys r us, you even get a free can or bottle after purchasing ten yourself. they also go on sale at least once a month and on the website come with coupons for other products like clothing and nuk bottles. when you sign up you will also recieve either mailings or emails of whats new with your baby every month with tip and tricks on what to expect to games to play or how to deal with colicy...