I have used screen protectors before and the hardest thing is installation. Trying to line up the protector just right with your phone and not get any prints or dust caught in the process. XDesign simplified that whole process with a guide that fits the iPhone XR perfectly. You wipe down the screen with the included alcohol wipe and dry it with their mini cloth as well. Put on the guide, peel off one side of the protector and place it on the screen. Done. Takes about 5 minutes and the screen is protected.
I cannot detect any sensitivity issues at all. The screen responds as though the protector was never placed on it. The protector is also extremely light and thin. Works perfectly with the Otterbox Defender case I purchased to protect the phone. I believe they have the right statement in that it will work with most cases. Likely as long as the case you are using does not have an included screen or parts that cover the display, you should be good to go.
Another great thing is the company is based in Silicon Valley in California. For those that would want to buy something local or within the USA, then go this route. I was pleasantly surprised.