Disclaimer - this was our first river cruise, and first cruise on a non-American ship, therefore hard to compare. Will give thoughts based on overall experience in case other nonEuropeans are considering.
7 day New Years cruise on Seine River.
2 cabins, 4 guests. (Including on child and one in a wheelchair)
We had a cabin right close to stairs but right under dance floor. MIL said she could her the dancing every night. Not usually an issue on the large/sea ships, so forgot to look what was on floor above when booking.
We walked the town on our own. Sweet town and great historical center. Saw cathedrals, clock tower, shopping area, outdoor cafes and even went ice skating on a teeny rink. Definitely worth the walk into town.