I would like to give you some feedback on how 5.1 and VDP is a major downgrade in terms of user experience.
First off, the program and the data are one piece. I get fixed sizes, which was not the case in VDR. Worse, do you not expect anyone to implement this on simple mirrored disk arrays? That is, the 1 TB ova requires a 2 TB disk and the 2 TB one requires a 4 TB one because it requires slightly more than the size of a 3 TB disk's capacity. Of course, if I wanted anything larger, I have to have multiple instances of VDP. What was simple has now become inordinately complex.
Second, for my simple installation, I have a private network and I just used a hosts file and it worked. Now VDP is hardcoded to ignore it (to ignore nsswitch.conf in the VDP appliance) and to use DNS exclusively, so I had to set that up from the ground up. Doesn't that violate POSIX or something to ignore nsswitch.conf?
Third, when the installation prompted me for my vCenter username and password, it rejects me. I recall that before (after doing a simple install all of vSphere 5.1), I had to add explicitly add the Administrator (the vCenter Administrator user) as a user to SSO before the web client would see my vCenter. But then I had to at least prepend the domain, that is, system-domain\, to the username before it would be accepted by the VDP installer. I believe I had to add a separate user other than the Administrator for that, but I don't even recall. This should have all be done by the installer automatically.
Fourth, what's up with the crazy password policy for VDP, which is on top of a different crazy password policy for the SSO?
I just played a little with the web interface...
Fifth, I find it more confusing than in VDR. In VDR, there were colors and icons and I could see clearly in events what had taken place. Now the listing in reports is totally generic with all the text the same size and colors. For example, the state of the machine is right there alongside with the backup status. Who cares about the former? I really just want to know which machines failed. They should be in their own list at top along with a detailed reason field to explain why. (I have found that I can manipulate the columns, but it's limited and why not just set them up optimally to begin with?)
Sixth, I may be misunderstanding some things here, but I don't see a way in the backup configuration to select individual VMDKs. When I click a triangle for a particular VM, it shows no further details.
Seventh, in VDR, if I ever had to restore the appliance itself, I could so easily and just point it back to the storage. It's not clear how to do with VDP, which installs only with its storage.
Lastly, I can't speak much for what's under the hood in VDP. VDR would often fail with cryptic errors and one desirable feature was some level of file restore. I think it would have been better to concentrate the effort on just those things and keeping the interface inisde vCenter mostly intact.