Don't really have a preference, I have used june tailor, 101, 505, and sullivans and all have worked but if I had to choose I prefer sullivans, however it is the worst smelling of all 4 but all of them are horrible smelling to me. I have to use them outside. I must be sensitive because people say they can't smell 505, but I can. I have heard good things about mettler but it is super expensive so haven't tried