The case scores a 5, however, the Spigen app scores a 1.
If you just want to protect your phone, the case is excellent, no arguments there, it feels solid and secure. However, if you want to use the smart function through the app (the so-called interactive window), don't bother. The app is buggy, very hit and miss whether it works or not. You can adjust the display vertically so it fits in the window nicely, but you can't adjust it horizontally. On long dates, such as today, (Tuesday September 17th 2014), the date won't even fit on the screen, let alone the viewing window. All you can see is "Tuesday September 1" it's not helpful at all.
I recommend the case, but if you want to use the smart functionality through the app, you'll be disappointed.