Having cruised Aquaclass on the Solstice in January we booked a similar cabin on the Eclipse.
What we didn't realise was that the Spa reception had been moved to the middle of the ship and the Gym treadmills were now directly over our cabin.
From 6am to 11pm when the gym was open we had loud pounding noises which totally spoilt the Aquaclass experience.
We complained to guest relations who at first weren't interested and offered a free specialty meal !! so we persisted and insisted the Guest Relations Manager visited the room and heard the noise first hand.
Apparently the free weights had already been moved after previous cruises and complaints.
No cabins were available to move to as the ship was full until Barcelona when we were offered a standard balcony under the Ocean View Cafe in the shade which would have had just as much noise.
The next night a staff member decided to use the gym at 12.30 am so I went upstairs through the side entrance opposite our room and explained in a firm way that I was trying to sleep and that she was ruining my nights sleep...she offered to move further along to which I replied "over some other poor customers cabin"...very thoughtful!!.
An email was then issued to the staff who have their own gym telling that not to use the customer gym at night.
We were eventually offered 30% discount but as Elite members and regular Celebrity cruisers this did spoil what otherwise would have been an excellent holiday as we met some great people.
Food and service was excellent however entertainment was average.
If you book Aquaclass avoid these cabins and book the odd numbers under the spa treatment rooms which should be quieter.