I got my my modem hooked up. I've got a rockin' signal (-73dbm), so speeds look great! 52 down, 24 up on my initial test.
I work in IT, so I'm a bit particular about how my network is set up. I already have a router and all my equipment/devices configured the way I want them, so I didn't want to use the built in router features in the MoFi box. I took the time to switch the modem into bridge mode ("IP Pass-through") so that all of the router features are disabled and it just acts like a modem. Plugged my existing router, it pulled an IP address, and I was off and running.
I'll post back my thoughts in another couple days once I've had some time to play with it.
We are looking into Ubifi and I came across your post. Are you still using the service and if so, is it still going well? Are they still in business? They are out of the router AND sim card on their site, so we can't use them currently even if they are. If not, do you have any other recommendations?