It's personal choice. I noted above what we had on Ry's, and on the card was all his meds, as there is no way they'd fit on a bracelet. My main concern with the bracelet and card was that they would be able to contact someone, namely me, if he got hurt or something. You can't trust that ER doctors know what Cf entails....
Edited to add :
We got Ry's from here, they have 'normal' looking ones : <a target=new class=ftalternatingbarlinklarge href="http://www.n-styleid.com/medical_id_bracelets.htm">http://www.n-styleid.com/medical_id_bracelets.htm</a>