got an email from spigen. Seems like they will address the buttons issues with a little addon they will ship for free.
Good for them to be on top of things.
http://www.sgpbanner.com/images/SP1141.pdf
I ordered through their Amazon shop, I guess I need to register with them for that.. I also noticed you can't really reach the silence toggle switch on the side of the phone through their case without long fingernails, but I don't know how they can resolve that.