I use this with a Droid Maxx and a LG G2 both with large cases. and have little to no problems docking ether phone. The lower feet do extend to their max length with docking and will not retract without taking the phone out and playing with latch to get them to go back in. But they do extend easy. I use the NFC tag to launch the iBOLT car dock app. I have simply stuck it to the dock so when ever I dock the phone read the tag and launch the app. down side is you have to manually close car mode or get the phone to reread the tag.
For the motorcycle riders out there I have also used this dock while riding and have yet to loose the phone out of it. It seems to hold on tight and I have driven down some bumpy roads. (however this is still early and time will tell if it will hold up over the season)