IMHO. They sound great. Like all drums it starts with tuning. I worked for a few years (4) with my builder (MM) to get the right bearing edge for acrylic. For me it was 30-35 degree, more of a rounded over Savannah sound. I am really happy with the sound. Not overall ringy like a double 45 edge. I plan to switch tom heads when I have the time to actually do it. These are some stock Attack that my builder prefers but I do not. The thing is that they still sound amazing. I did switch the batter BD to a SuperKick 2. Everyone who has played them asks the same Q, why switch heads. I think it is a testiment to our research on the bearing edge and acrylic shells. We went with a thicker shell (1/4), shallow sizes, 6x13 snare, 5x8, 6x10, 7x12, 8x14 and 17x20, offset lugs.
Acrylic set number 2 is under construction: modified Bonham, Optical Yellow Acrylic (Tennis Ball). 26"BD and shallow large toms, 14, 16, 18. maybe 9x14, 12x16, 14x18.