The ipad studio app has been working great, however I use one as a monitor for the photographer and often the client will ask to show the photographer an image. Since I don't have the ability to control the ipad I have to turn a monitor or the photographer cannot see it.
Current workaround
I usually have to setup a hollyland transmitter and connect it to the ipad so the viewer is displayed in real time. The color isn't as good on the hollyland though.