I don't think Campbx is is a rip-off or a scam.

However my experience thus far has prevented me from entrusting them with any serious coin, US-issued or otherwise. My main worry is that they lack the resources to handle demand. Apparently, the Japanese aren't impressed either.

* The server is painfully, absurdly slow. Expect a five minute wait just to log on a visit your account, and a similar wait every time you execute a transaction or even browse the site. I wrote a help ticket asking them what was going on. No reply. The following week I sent it again --- this time I got a response saying that they were in the process of moving to Atlanta and things would improve then. No time line, no details.

* I also wrote CampBX with some basic Bitcoin questions. No reply.

* Transfers from Campbx to my wallet take far longer than with MtGox.

All that said, the platform is intuitive and transparent. Once they get the server power and the staff to run things properly, it may prove to be excellent.