We are semi-regular cruisers with RCCL, with Platinum status. We last cruised with them in 2012 (Serenade around the Med). I am mobility disabled and typically travel with my husband. This is a long review, apologies.
Ship - I find the Radiance is a good size if you are not a keen walker; you can get from one end of the ship to the other in fairly quick time and everything seems within a decent distance. Usual bars, with the welcome new addition of a pub layout to replace the sports bar, and three included meal locations (MDR, Windjammer and Park Café). Whilst overall the ship was well maintained and very clean, we noticed various areas where the recent "refit" had not had an effect eg damage/peeling paint on top floor of theatre.
Cabin - we were in 7114, which is a disabled balcony E3 cabin. Hence you have more space and a walk in shower - this was very helpful. Whilst the cabin was kept very clean and tidy, we did have a couple of small problems - our attendant did not seem confident in her towel animals and we only got two through the whole cruise, plus the balcony door was consistently left closed but not locked. I know these are minor but we look forward to our animals, and it formed part of our overall sense that the quality is being downgraded.
A very well adjusted cabin - roll up to bathroom door, automatic door opening, roll in shower, shower seat if required. Slightly lowered bed, of a good size.
Hop on hop off bus left from just outside cruise ship and was discounted in price. Also went to Rosenberg Castle, which we enjoyed very much. The castle does not allow you to take rucksacks inside and instead provides small lockers at a nominal charge.
Shuttle bus for about $8 return took us directly to the old town, which was lovely. Strong recommendation for the Beer dispensers on the market square.
Hop on, hop off again - got a discount as we stuck with the Greyline (Stromma) firm. Definitely worth doing the boat and bus, the boat was a great way back to the ship.
Nothing to do in Harwich!