We sailed on the Oasis in July 2018--were very impressed. We liked the big ship atmosphere & food-service.
Had booked a 2020 trip on Harmony, but COVID caused the trips to be cancelled, so this trip was a make-up for that one.
I completed all documents I could on line before sailing. Wife completed the remainder on her Royal App. This made check-in very quick. Only 3500 pass . on ship accordingto the crew. No crowds. Lots of crew everywhere. Everyone was friendly & helpful. Wife had issuses with linking Internet to her phone & tablet, but after two trips to help desk--got that handled.
Clean--everything worked. Nice walk-in closet. Tub shower has hinged glass divider that would swing open if you bumped it and allow water to splash on foor. Small tubes of shower ger/shampoo--wife didn't like that--got bigger bottles from steward.
Cabin has a master switch that requires you leave your Ship Pass Card in it to make the lights work. No instructions to tell you about that little issue. Finally figured it out on my own--used a grocery rewards card instead of cabin card. Worked.
Sliding door to balcony was heavy & needed some oil. Took some effort to open & close it. Large balcony-- 80 + sq ft.
Beds comfortable--better than home.