We sailed Beyond in February of this year. For us while the ship is beautiful, full of art and unique sculpture, I would actually prefer Royal Caribbean Oasis Class ships or Odyssey of the Seas. That is, if it is many things to do that you want. Also while Beyond's and Apex's shows are a big improvement on their previous ships' shows, Oasis Class and Odyssey still have them beaten even in that category.
But what is the OP looking for? Beyond has a very good variety of restaurants. It has a fun walking trail that slants over two decks for an extra challenge. The garden deck and Garden Grill are very pleasant.
At night, the bar men in the Centrum put on an acrobatic martini pouring show. There are live bands. They won't be playing current top ten music. I recall an Abba night, for example.
One very dramatic difference is that Royal Caribbean is definitely a family oriented cruise line. You will see far more children than on Celebrity which is perhaps the reason why Celebrity including Beyond seem more staid, more elegant and even products in the shops reflect that.
Even at fifty, you will be in the younger median of cruisers especially at certain times of the year such as when schools are keeping. Oh, important too. If you smoke, Celebrity has limited places for smoking, especially not in the casino though I had read some here who said the casino is allowing vaping.
