We have used CMV before on Marco Polo which was enjoyable with no complaints so were looking forward to a similar experience. To be honest the ship and cruise in general was up to expectation but we were far from satisfied with the cabin (inside, deck seven number 7146) allocated to us.
From the second night out we were subjected to heavy noise from above which made it almost impossible to sleep, it sounded as though heavily loaded wheel barrows were being moved back and forth across the cabin roof. After putting up with it for two nights the matter was raised with the reception staff but were advised that there was no alternative accommodation available so nothing could be done. In the meantime we discovered from other adjacent cabins that we were directly below the galley and the noise was due to late night and early morning work in the bakery, Later in the week a cabin did somehow become free for us to use so normal sleep was again possible but by this time we were more than a little dissatisfied with the treatment received.
Correspondence with CMV achieved nothing apart from being told that such noise was an understood risk of cruising a fact that as a cruiser of many years experience with various lines I was not impressed with.
To conclude I can only emphasise the need to check carefully where your cabin is situated and most definitely avoid number 7146 on the Magellan and probably others near it.