I think the virtuemart team is doing a great job, I hope soon launch version 2.1 for joomla 3 and hope they will include the option multi shop.
Obviously there are many paid options that may have advantages, but I think many of these benefits are covered by the large number of extensions that exist for virtuemart.
I think you can improve a lot more, but have done a great job so far.
Thank you very much for you review.
Yes, we believe in flexibility and freedom, that means we write VirtueMart without limits.
and yes we will improve a lot more :-)