It's not a cell plan
I think people complaining about limits on the cell portion of the plan need to free themselves of the mindset that "unlimited" means "unlimited cell usage". It's not a cell plan. RW is upfront and clear that their service is for "wifi people". To me the service is more like a mobile voip service w/ the added really cool feature that you can access the 3G network for a fairly substantial amount of voice and data use. If you tried to market the service as such you'd probably get mostly blank stares. I can't really say I understand the way they calculate the CUI - they talk about a 7 day rolling average, but all their examples are based on a month - but I think it's an honest attempt to make it simple for people to keep track of their stats.