They worked with me on my at&t ipad mini, but since it's a version 1 I was only able to get 3g with it. At least they tried, ya know?
Ultimately I ended up getting a samsung hotspot pro and I got out of there with my ipad back to how it was, and the samsung hotspot pro up and rolling. They are busy lots of times, so keep that in mind. You're not going to walk in there and be treated like you're the only person on the face of the planet... it seems like lots of people walked in there when I was there and thought that, then walked out.