We chose Radiance because we thought it would provide a great holiday for adults and kids alike, without being too kid focussed (we were prepared to put up with our own kids but didn't want too many other kids around!!!). We also knew that being a longer cruise, there wouldn't be as many kids.
Our family suite was fantastic and even though some people say the balcony is too small, it didn't bother us. It was great being near the lifts and only one floor down from the Windjammer and pool deck and two floors down from the Kids' Club. There were a couple of nights where the noise from the Centrum was quite loud (entertainment usually finished by 11) but ear plugs fixed that (and kids didn't seem to notice).
We choose set time dining (6pm) which was great with our kids, who would run off to kids' club afterwards. Also had the same fantastic waiters each night - Sachin and Roshan - who looked after our Coeliac daughter very well.
There were a lot of older people on the cruise, which was OK, although they did seem to settle in the Solarium from dusk 'til dawn and we never once got a seat in there.
Entertainment was good. We did theatre shows, trivia and bingo (daggy but fun).
Ports were great, especially Bali and Airlie Beach (Ocean Rafting and snorkelling).
Next cruise I would stick with RCI. Probably going to try Quantum of the Seas.