I have no comparisons because this was my first cruise but it was the best dollar I've ever spent. The Radiance is a beautiful ship with lots of glass so the sights are wonderful all the time. The whole experience from going on the ship to leaving the ship was great. I'm not going to go in depth with the review because you should experience the Radiance yourself.
The service was the best service I've ever seen and experienced. They truly made the cruise very enjoyable. The dinning staff was our favorite because they were so personable and friendly, however everyone on the boat was. The food is great in the dinning room. I often attend fine restaurants and this was better than any restaurant that I have attended. The options are great and the menu has a great variety of foods. Our group ate there every night. The Windjammer also has a great selection and again the food was great for both breakfast and lunch. Again a very wide variety of great food. Buffets were great at night. You better workout a lot before you attend this boat because they will have to roll you home because the food was so good all the time.
The entertainment was outstanding all the time. So many things to do, honestly 7 days is not enough but that's ok because I'll have to do the Radiance again.