The nicest thing about this plugin is how clean it is. I would not recommend it for a high performance store. But to be honest i would not recommend Joomla for a high performance store either all though VM is pretty awesome and has the benefit of many years of development and a large community.
This componene thas a bright future. I hope they keep developing it. I am interested to see where it will be in 9 months. I think that will be the test for them. Looks beutyful and the is already an AceSef extension for it
cant wait to see what the future holds.