As you note it's an older ship. With that comes a few tradeoffs including the size of the cabins (not really a problem) and fewer options for food/entertainment. However on a Vancouver/LA cruise I'm guessing there will be more port time so the ship itself won't be a major factor.
We actually sailed the Radiance on an 18 night cruise from Sydney to Honolulu about 10 years ago. We were in a Grand Suite on that cruise and it was quite comfortable. I know the ship has been refurbed since that sailing but am not familiar with how long ago that would have been.
What type cabin are in in and how many people? Have you cruised before on other cruise lines?