stumbled upon this thread while searching for accessories... well done on V4.. took some time to read through.
migrated from S5, PO onyx with no problem till now. phone 2 phone transfer using smartswitch... super easy. all functioning as per normal even after the FW upgrade. Feel for all the bros and sis with the bootloop/hang/spen issues... hope you get your replacements soon..
Using the ORI SP bought from maxis Pavi 2 days back at RM35.10.. think they still have 1 or 2 stock.. no lift-off issue with el-cheapo Baseus Air Case.. Spen with this SP also no issue.. didn't change the tip.. only grouse is the SP & case super fingerprint magnet..
Iris was fast, but fingerprint scanner from what i read has the same issue like my S5, sometimes takboleh scan... give it a good knock and it will work.. seriously... search for S5 fingerprint problems vids and you will know what i mean..
Battery is surprisingly good... full charge 2 days with FB, Chrome, News, online Trading, Istagram and other social medias. No Games. noticed the so called wireless charging is not fast charge as compared to wired. Wired fast charge using free PBank form 29% to 100% in 1 hr. wireless longer than that.. as for the overnight charging, IMHO no problem as i have been charging my S5 for the past 3 years like that and batt still last 1 day.
Private folder same same like S5... this is where all my goddies are kept... LOL..
Best feature on this for me is the heartrate monitor selfie function....

BTW, anyone using Rock Royce Slim Amour or Nillkin Defender? Feedbacks appreciated. looking for protection and great to the touch. many thanks!