I bought their PlanPlus product. I bought it from their European outlet (I work in the UK).
It transpired that I had to reset my computer's time/date format so that all of my software displayed the date "wrongly" (sorry, US cousins) in order to get their software to work.
You would imagine that to be a material fact that would be as well to disclose at the point of sale to the European customers they *know* will be buying the product.
But no. So I returned it. And won't touch their products again. They appear to be roughly contructed.
(NetCentric's Outlook add-on is also a bit roughly constructed at the moment, but they listen to their customers. That makes all the difference).