I have a cradlepoint AER2200 setup with an AT&T connection at a location across town at a warehouse that gets occasional use. We were going to be using handheld wireless bar code scanners that needed connection to our ERP server. I created an IPSec tunnel to our main office and used an ACL to only limit the correct ports to the server here. Anyway, the connection has been reliable even though it doesn't get much use.
They were going to move out of that location and I was happy because I was going to use the cradlepoint in the main office as a backup, but more for out-of-band management, than for the whole company. Now we have at least another 6 months at that location, so I might end up getting a new one for here anyway. We'll see.