We have cruised a lot and I rely heavily on the information found on this board for cabin selection. We took a chance on an AQ guarantee cabin on the May 10, 2019 Millenium sailing. At the time there were no reviews available for these cabins
For want it is worth we stayed in cabin 1004 and knew the person who stayed in 1014. Our experiences were similar. The cabins were on the size of the Oceanview cabins, not what was expected from an A1 cabin. Even the bathrooms were somewhat smaller in size. Thankfully the grabbing shower curtain was gone. The balcony was also noticeably smaller--the chairs needed to be placed at an angle to be able to get to them to sit in. The worst thing was the noise from the Cosmo lounge upstairs. It began around 10:00 pm and would continue until 1-2 am every night--didn't know silent disco could have so much noise. One night it was loud enough we could sing along with the lyrics of the song being played.
With cabin 1020 being located closer to the elevators I would think it would not have as much noise from upstairs.
Was very glad to see X reclassified these cabins, just wish they would advise people why they were reclassified as a lot of 2C cabins are excellent cabins.