thank for all of the comments. i went ahead and bought the 2.5D version of the Icarez 0.33m protector as i wanted to be certain that i didn't have lift issues as i continue to figure out what i will use as my case(s) for my XS.
my first protector appeared defective (i've sent icarez a note)...it didn't adhere well and i tried to persist and see if some remaining bubbles would disappear in a day, but they never did. (i am a very experienced protector installer -- done dozens for friends and family -- so i was surprised to have bubble issues with these protectors). moreover, the bottom right edge just didn't want to stay down so i'm guessing it was defective and hope icarez will send me another.
the second protector seems to adhere well, and i have a few bubbles remaining...not as bad as the first installed one, but my fingers/thumbs are raw drying to rub them out. i'm down to 3 right now...i am hoping they may disappear on their own, but i'm have some doubts since not all of them did for my first protector.
what experiences do u guys have with bubbles and the icarez (these aren't dust spots, but small bubbles that are about 1-2mm in size). i usually can rub any of them out (Maxboost, Otterbox, Spigen, etc.) immediately.
one thing i did notice (not sure i'm happy or not about this) is with my current favorite case (Caudabe Sheath), the difference in going from the 0.25mm Maxboost to the 0.33 icarez 2.5D is very noticeable. i still have a lip for face down protection, but its notably less. i'm probably now down to ~0.5mm between the lip and the protector. that's a little worrisome (i wasn't concerned at all, surprisingly, with the 0.25mm protector).