Where to start? I got my first Cradlepoint, a CTR350, in 2008. Soon I got the PHS300 for my travel. Both performed well, until the CTR350 had a problem. The techs at 3G Store worked both on the phone and remotely with my problem. Cradlepoint's warranty is first class. I just got my third Cradlepoint router an MBR1000. I am pleased with the quality of the routers and the excellence of the service from both 3G Store and Cradlepoint.
With my air card I use these at home, on locations for a hot spot and traveling for my own 'secure hot spot'. I can understand a RV-owner's love of these devices.
Even if you use an air card alone get a Cradlepoint I believe my air card performs better and the added WiFi has been appreciated by my guests.
Jerry, Maryland