ACX wroteInteresting... have you already bought it? Any feedback?
I bought it back in March, and have since been using it in my 'test' RPi3. By default it has 1 SD card with an 'optimised' Rune install (which is hardly ever altered), and the other SD slot is used for testing other installations, such as modified Rune, PCP, DietPi etc
It's a very handy little gadget...