“After owning and wearing an Apple Watch constantly for 6 years...i've recently become sensitive to the back glass against my skin. This still doesn't cover the entire back, but it does minimize my exposure, and I wear my watch many fewer hours/day than i used to. I did liquid glass on the entire back...and will probably try to eventually cover the sensor 'bubble'. But this is step 2.and so far so good. It isn't too bulky like the plastic/glass one. And i like that you can change bands without removing it.”