I was just in cabin 1953 on the Volendam in October/November and it was just fine. It was the first time I'd been on a deck that low, but found I really enjoyed it.
There was NO noise, no traffic whatsoever from people passing the door, close to elevators, no noise with luggage, and you're close to the gangway at ports.....easy off the ship and easy back on!
One other thing I liked very much was being close to the sea - at night, I'd crawl up into the "window seat", have a glass of wine and watch the waves and the stars. I would definitely book a Dolphin Deck cabin again.