I have just bought an iPhone 6s, and to protect the screen I also bought a Zagg glass invisible shield.
The concern I have will thickness of the screen protector interfere with the operation of the 3D touch, which I find very useful.
I be grateful for your thoughts.

 

For the price of the things, you'd expect them to come with Gorilla glass, which shouldn't need a protector.

 

I've bought this one
http://www.ebay.co.uk/itm/1915426208...%3AMEBIDX%3AIT
fits well and everything works as it should and doesn't interfere

 

No it won't, I have a 6s plus and have it in a case with a separate screen and it works fine

 

Same here, no issues with 3D touch.