I personally, don't necessarily see the advantages in having an isolated drum system like Sleishman, in order to get more sustain out of a drum. In my opinion and taste, too much sustain can be very annoying and it can interfere with the sound of the next drum you hit because theyre both ringing at the same time with the frequencies interfering with each other. What I want in a drum kit is simply a big powerful sound. Besides all that, who on earth is going to hear the so called advantage of Sleishman shells through a wall of blasting guitars? It just all seems like marketing nonsense to me