Volusion may be feature packed but what good are loads of features when you can't get support for them? A Forum to provide user support is one of the most basic support options available to a company like Volusion and that it is missing whilst they try to find a solution speaks volumes.
Outdated guides and blogs are a major turn off and the bandwidth overage charges are a relic from the past that they should have got rid of a long time ago.
Template charges at £690 are ridiculously high and the lack of support for payment gateways is bad news for UK users. Plugins for Cardstream, NoChex and others should have been developed a long time ago.
Much better options are available with more reasonable pricing and better third party integration.