We avoid deck 8 because of pool and lido. We try to pick a cabin sandwiched between decks with cabins. We have had connected cabins and only once was there a problem. We were onboard for 42 days and only 7 were a problem with LOUD folks next door. We knew all sbout their marriage problems, their kid ‘s issues, how much they disliked Americans (we are 🤣), what they liked or disliked about the food …. You get the just - they were LOUD. We were very glad when they departed!
Just be sure you look above and below - oh and we have never had elevator noises either.