I have bought quite a few Tama die cast hoops. They are nicely made. Die cast hoops add some focus to the sound and reduce some of the overtones, due to increased consistency of head tension compared to triple-flange hoops. I use them for toms, and some snare drums. Note that the increased mass compared to triple-flange hoops can increase the pitch of the drum a little. It is also necessary to have flat and consistent bearing edges, as it is much harder to compensate for bearing edge variations when tuning with a stiff hoop.