We sailed the Edge last year and, after a day or two of adjustment, love our IV. Waking up and opening the doors, curtain and top window --- no better view to wake up to. We didn't miss not be able to go to the Retreat area. Loved the Solarium -- wish Royal paid some attention to that , the Solariums on Oasis class ships are laughable. We also thought the main pool deck was one of the prettiest we have seen, and the main pool is huge.
We are booked on the Apex in January 2021, in a category E1 with an IV. Looks like our family cruises (and a TA or two) will be on the Oasis ladies, but when its the two of us, we will lean towards Celebrity.
mac