It was a bitch for me to get the back to fit right. Had to hover over the iPad Mini for over an hour to make sure it is flush on the edges. It kept sliding back.
The edge with the Vol and Rotation lock was difficult too. it wouldn't stay flush along the edge and curled up on me a few times. Ultimately I got it looking really good, but I've applied well into the double digits of skins at this point. I feel like a novice might have a slightly harder time with this one. The iPad 3 one was much easier, with only the corners being the problem for me.
Skinomi generally makes a good product. But I felt like this skin was too elaborately cut this time around.