I am pretty new to Virtuemart and now I do have to set up my first Webshop for a Customer. As there is already a Virtuemart 2 Version I am now not shure which Version to take. Well I think I am going to use VM1, because it is stable. But now I am asking myself:
Advantages/features of VM2
Extensions for VM2
The extensions directory contain a lot of extensions for VM and some were updated for VM2 ( http://extensions.joomla.org/extensions/extension-specific/virtuemart-extensions )
Stable version of VM2
There is no clear data about this now. The current version at the moment is a release candidate which means a sable version is coming soon after sufficient users and developers test it and report the bugs.
Experience with VM2
I've used VM1 and migrated two websites for VM2 before. VM2 definitely worth the try, templates is way much better than the old table based ugly coded layout. Everything is perfect except if you are going to use Joomla 1.6 The modules does not work without glitches. Other that it's working with Joomla 1.5 perfectly.