I still haven't gotten on a Polaris flight but flew an HNL - IAD 777-300ER configured for Polaris service.
While I really liked the privacy I have to say that there were real unanticipated impacts including to service. FAs can't really tell if you are done with a meal or if you need something. I felt the privacy provided an excuse for lackluster service. Again, the service might be different on a true Polaris route, but I was underwhelmed.
I also would not want one of those middle seats or the window seat with the table against the window. And, you need to make sure the seat is configured so you actually have access to a window since some didn't.