Having said that, one thing we immediately don't like about 5.7 is that we seem to have lost the Enterprise Manager where you can see all your other DD's on one management console. I haven't yet found that in whatever revision of 5.7 we're running on one set of our DD's. I'll be trying previous revisions until I find the last-know that kept EM. While it's far more stable than older major revisions, they did take away a lot of features that were useful.
Veeam B&R v9
Dell TL2000 via PE430 (SAS)