Delphix is more using the power of ZFS and Copy On Write to give you instant database copies with minimal storage footprint. We used it to give every developer their own Database that they could do anything to and not worry about locks etc. Refreshing to a more recent copy was a very quick operation and required a developer running one command. Had a nice web interface and a REST interface for automation.
I'd recommend it but with the caveat that I've no idea how much it costs as it was a Dev thing a client was encouraging use of. Was really nice to work with though.
