I love my Z2. It's almost two years old. Only down to 130' . Not too heavy for travel, breathes like a dream. Some of the others I tried breathed a little too "wet" especially in head-down or upside down position (How else do you look under rocks and into crevices?).
As others have mentioned, all the Atomics are essentially the same reg, just different materials used for different parts in each.
As others have mentioned, all the Atomics are essentially the same reg, just different materials used for different parts in each.