Simplicity would be a welcome addition to this area, since too many times have I seen “virtual” conferences spending tens of minutes on setting up the meeting (and it is quite frustrating).
For pricing they use the same model as the software-only solutions, namely a per-user license. If we compare the prices, you will conclude that the cheapest unit is equivalent to one and half years of GoToMeeting subscriptions, which is acceptable. I see this being a good solution for larger virtual training events (universities for example), however the value for smaller shops is not that clear. ~~I worry that using a physical device means that your entire staff looses connectivity when/if the device goes down (because of a power / ISP outage). If your workforce is distributed around the globe (or even in one country), “cloud” service could route around the problem for the people who still have Internet access.~~ Update: (again, from the comment below): the company seems to have a fallback solution for such outages, where by they offer services using their (hosted) equipment during outages, free of charge.
Full disclosure: this is a paid review from ReviewMe. Under the terms of the understanding I was not obligated to skew my viewpoint in any way (ie. only post positive facts).