The worst cigar I have ever had has to be the La Estrella Cubana maduro. Wasn't expecting much but it was horrible. Didn't make it a full 1/3 in and tossed it. A close second was the La Aroma de Cuba Mi Amor. With the CA rating, this one surprised me and maybe I got one they accidentally dropped in the toilet, but it was bad enough to make me never want to try another one.