Right - ZFS is awesome even as a non-boot storage pool. But one of the main drawbacks of MacZFS (the open-source competitor) is that it can't be booted off of, and this product doesn't seem to offer that feature as a competitive advantage.

Presumably this product offers support for the latest zpool version and is based on a much more recent ZFS codebase (and hence should perform better as well), but because their site is so devoid of benchmarks, it's hard to tell.