This is great! Could you post your VMware snapshot results in the VMware section – others could benefit from this as we don't have much information with VMware other then our customers posting results on this section.
Yes you will need to take a snapshot for each Volume, you can create up to 10 but this can be a performance hit. Estimate the amount of changes you expect and set this size. Snapshot is not designed for long term, our research and development team will be working on developing more advancements to this in the future but no date is set as of yet.