Aroma and cleaning efficiency is one thing but safety and cleanness of your washing machine is something different. I know what I'm talking about because I had to change mine two months ago...Service man said that it was in good condition and that's why it served my family throught 5 years with no problems (Mastercook 2135 PDT). Unfortunately that day came and limescale damaged one of the srews keeping in place washing drum cracked... Repairment was too expensive so now we have new "guest" in our home... What was important in using washing machine? Keep it clean, with no water inside the drum after usage and...use cleaner powder! Thanks to it your WM will serve you longer and better :)