I have heard that the IJ175 is good for installation, but a real pain for removal later.
Have NOT tested any IJ280, but isn't 280 the series name for 3Ms reflective cut vinyl?
We are still sticking with good old IJ180c here, seems to be the best all around product as far as install & removal many years later.
We warranty everything, and hardly ever have any issues.
Now window perf - 3Ms is junk!!! We have been using Continental/Panorama materials with good quality materials coming in & quick installs, and no major failures so far.