I have done over 50 cruises and have tried many solo cabins. Cruise lines don’t like solos as we are not as profitable as couples. They tend to put solo cabins on lower floors, near the front or tiny inside cabins and lack any chairs to sit on. You save money most of the time but not always so check regular cabins because with sales sometimes a regular cabin even with single supplement are cheaper and always bigger. Below is my ranking worst to best of the solo cabins I have tried
Worst - Costa’s solo ocean view cabin. It was tiny with a hard bench vs twin size bed . It was a porthole vs a window. The worst was where it was on the bottom of passenger cabins beside the crew door. So loud between the engine noise and crew traffic. My cabin had no air conditioning for a few days and their solution was to leave my cabin door open.
Next worst was NCL’s solo inside cabin. It’s less than 100 feet, bad air circulation and the dirtiest of all cabins I have had. The shower is in the cabin. I took the cleaning supplies from the steward and cleaned the cabin myself. The solo lounge was a joke. Seldom had supplies and no concierge. It’s the reason I have not booked NCL again.
RCL inside cabin was on a high floor but attached to another cabin. The layout was good but again tiny. I liked the virtual sea view and the bathroom was regular size. You can hear your neighbours. Ventilation was poor especially after a shower.
HAL ocean view is at the bottom of the ship at the front. You hear the anchor, engine noise and the theatre above. It was an ok size, but no chair. Bathroom was regular size. Mine had no air conditioning for 2 nights.
The best so far was RCL balcony. The balcony was almost the size of the cabin. The bed double size and comfortable. It’s on deck 4 and there are life boats immediately below. But by far the most comfortable.
The only one I would recommend is the RCL balcony one. The rest had issues with noise, size or poor ventilation.
I never give up and am trying Cunard’s solo ocean view in December.
Again always check the price of regular cabins. Try not to book a solo cabin unless the price is amazing.
Hope this helps
Marcia