You cannot tear it by hand. It is essentially a poly strapping tape just like everything else. I’ve been using it for over a year...it’s not some revelatory new tape, but IMO it has the the best combo of stretch, thickness, adhesive, price of any of the tapes I’ve tried.
Stan’s/4289 = not as flexible/stretch, weak adhesive if you have to pull up and reposition tape.
Velotape/8898 = thinner, stretchier, but splits when you punch out the valve hole.
Kapton tape = way too thin/stretchy, wrinkles/shifts, difficult to apply.