Yes,I used to have a long,long time ago a Rogers wifi network thingy, ( haha ).I had it set up in one of my vans,but it would be to big to carry around.It was one of their first thingees to receive a mobile signal.I forgot to make sure there was a USB port on this new tablet.
We use some of them at work (both rogers and bell ones), and they work pretty well.
They are pretty much not a lot different than hot spotting to your phone itself.
Limited range (cant go super far from it) but gives it full internet access.
With the capabilities of doing the wifi hotspot on the phones, we are generally are not bothering with the other units anymore.
(though, they are a little better, if you are having possibly multiple devices connect. Say having one at the cottage so multiple devices can connect, etc.)
I prefer to have my own personal internet connection,rather than hotspots.
Was at the Rogers store and they told me just to take the card out of the rocket stick and install in my tablet,but I don't see doing that as I mostly use the rocket stick for my Chromebooks when out and about.