Your review makes no sense. You have to review the integrated features and not features that are not included. Where did you read that the automatic mode supports Virtuemart?
So, if we take your logic, then we can rate every extension in the JED down because of missing features. This is ridiculous!
Why do you destroy a good overall rating although you don't use the extension? If you really need such a feature, then contact me and sponsor this feature for the Joomla! community! I work without charge in my spare time and can not include every 3rd party extension to avoid such unfair reviews...
I am the owner of flexiblewebdesign, can you please give me more details about your experience with the support team ( firstname.lastname@example.org)? I can guarantee you that that kind of thing will never happen again.
Because it is an extension for Joomla, it's not for everybody as it takes more work to keep the system up and running properly, but for the same reason Joomla + Virtuemart can offer you much more than average shopping cart. I do not recommend it if you are looking for easiest system but if you are willing to spend some time with it, go ahead,It's free for goodness sake!
Migrations have always been troublesome.