Just browse through the community forum (http://communities.vmware.com/community/vmtn/vsphere/datarecovery-vcb) and read the posts. I suspect if you install VDR, it will run fine for a week (give or take). Then, the integrity check will not complete, or will fail. Backups will either be skipped, or will completely hang. VDR (as an appliance) will freeze and you'll have to force a power cycle to reboot it. Datastores will become corrupt (I never personally seen this, but there are many reports of corrupt restore points - even in the VDR release notes!
Do your homework - don't just download VDR and expect it to be the "be-all end-all" backup solution. If it works for you - great! If it doesn't, you'll join many others that have tried it and eventually decided to stop using it for now. Don't forget - it is a v1.0 product. It is new, unproven, and according to the community forums - suspectible to reliability issues.
Don't say I didn't warn you! You need to test it and determine for yourself. BUT - if are are smart, you wouldn't rely on it as the only backup solution for your images!
