Great value coils
NOT Bad but not good
I have used these coils in a K3 and the previous nautilus buils have never found that they produce much flavour other than for 2 to 3 days. They carry on producing vape but with little or no flavour in well under a week. I do use a sweet flavour juice which is quite dark so maybe they last alittle longer with other juices. I have never found a MTL coil that lasts and works well for much over a week , despite the claims.
An improvement over the x that's for sure