Cascable or Camera connect and control? For iPad as monitor.

Hey folks! I'm looking for opinions on these 2 iPad apps, so that I can use my 10" iPad mounted on a light stand, as an external monitor. I actually don't want or need to be able to store or adjust images, just see them as I shoot.

WiFi would be the best but my googling tells me that USB cabling is the annoying but reliable way to go.
Nikon d600, btw.
Opinions?