I had back-to-back weekends of Polaris long haul flights O&D out of EWR in Term C at the end of December and my experience was positive overall in with the prepaid parking scan actually working both times, TSA, snd especially the Polaris lounge staff.

My only slightly Newarky issue was at the second checkin as I walked over to print a paper BP when the UA rope dragon asked if I was United premium or flying in Polaris and I said "yes both" and she tried to send me downstairs as for some reason she presumed I said no...but it was minor and resolved quick enough. Other than some Term A lounge overcrowding my EWR experience has been fine lately.

ORD has been much more rude and annoying for me...YMMV