I used to use coated emperors for pretty much everything! But I've come to accept that they just aren't suitable for live playing. They don't have the same durability and reliability of tuning as some of the competitor's products, particularly in the Evans line. So they have been replaced as my live head of choice for most applications. Having said that though, they are still my favourite drumhead, particularly for jazz and swing. Yes, they are double ply heads and are a little bit heavier than most people like to use for jazz playing. But I love the tonal qualities of these heads, both on snare, kick and toms. They have a really warm and dark tone with lovely sustain and great attack for accents. Really beautiful drumhead. I don't use them live any more, but I won't use anything else in the studio!