I think one of the problems I'm having is figuring out where the product would fit in my workflow.
Are you looking for people with dedicated backup and recovery?
Are you looking for people without BaR but uses a lot of VMs?
Should I backup anything with this, or just my VMs and DBs? If so, how does it compare to [existing VM or DB backup system]
How does it compare to using rsync with hpn-ssh? Using hpn-ssh significantly improves rsync speeds, though I don't know how it works with sparse files since I use dedicated SAN backups for my VMs.
The difference is important when you have many 50GB VM disk images with just 2-3GB occupied (as I have).
Rsync doesn't support --sparse --inplace.
Also the virtsync command line is more similar to scp than rsync. No need for any configuration files - it uses ssh as its transport.