I recently started supplementing with formula and I had some samples of Similac and gave it to my son, since he seemed to like that I have gone for that. My friend gave me the Similac checks she had. I just signed up on their website. Just curious for those that get them how often do they send them to you? Also do you ever have a problem using them anywhere? I used them at Target yesterday with no problems. Someone told me at Babies R Us they check the name to make sure it is you.