I love HTPs & CDs, but can't stand the mushrooms & black balls on the CDs. I have CSs & Candlewics Ecos, CSs are better because of the highmelt point wax on the wick. I rarely get mushrooms & if I do, it's because of too much FO. I was never able to find the right HTP to go in 464 & because the burns are so beautiful with Ecos, all the way down, I stopped trying the other two wick types. I have so many HTPs & CDs, I do hope I find a use for them someday.