Hi there, we just got back and pondered purchase prior as well. I’m actually glad we did. The only place it could not be used was on CC shops and getting off/on the boat. Otherwise, it was great to just open room doors or buy something on board. Felt no different than an Apple Watch. During certain aspects of deck shows it goes off with lighting. I didn’t miss having to wear the lanyard around or keep track of it. Lanyards stayed put until CC. So we too had decided NOT to get them but prior to cruise, decided to pull the trigger. Now, we only had issues getting them connected once on board but come to find out that 2 in our party had received defected bands so they exchanged them on the ship and helped us connect. Another in our party was able to connect with no issues. If you plan to cruise again, it may come in handy as we definately have them set aside for the next sailing. We purchased 2 of the solid colors (cheaper) and 1 with a design.
To add, we had no issues in stores - didn’t have to take them off or anything. So my review would be - easy peasy; really only used it for purchases and getting in the room. Otherwise, there’s no need to use it. I can’t relate to younger kids clubs but for the teen club, they had to register and a marker/tag was added to the band which can slide right off but showed they had registered so nice visibility for the teen club.
Also, just to add (sorry, I know you didn’t ask) I wasn’t sure how I would feel about the navigator and info on the phone as I wanted to disconnect but I didn’t mind it. Not to mention it’s all on the TV.
Either way, enjoy! Band or no band.