Haven't used it yet. My wife has been at work all day.
I will use it this weekend on my stoptech calipers (ST40/ST22). I'll try and use it on a buddy's ST60 calipers as well.
I can usually pull the pads out of my ST40 calipers. But you just push on the ears to get enough space to take out the pads. Then you insert the tool and spread.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red