I have a set of Zultan Caz on a kit I play regularly in a church and they are ideal. I have the 16 and 17 crashes; their tone and character are very distinct from each other.
Both respond well at a range of volumes. There's a good crash sound available at lower volumes, and both respond very well to cymbal swells. Both let me use mallets to build a crescendo that has a bright shimmery feel even at very low volumes.
The 16 has a much sharper attack and brighter overall tone than the 17. It can be a struggle to control it at lower volumes, and has taken a while to get used to it. It is almost like playing a large splash. I happen to like that .. I'm not a fan of small splashes.
I'm very pleased with the Zultan Caz set. The value for money is incredible. I have some reservations about Thoman's packaging and delivery, as in my review of the Caz 19 Crash / Ride, but I have no reservations about the cymbal itself at all.