Welcome to cruise-chat.
The extra room is nice to have, but is it worth the extra $500? That depends on your cruise budget. We like suites because of the space and larger closets, but in reality we are probably wasting money since like most cruisers we don't spend much time in the cabin. One benefit to a suite is that you get two cruise credits, which means you can accumulate points towards the higher levels of Crown and Anchor membership more quickly. Do 3 cruises in a suite and poof, you are a platinum member, instead of the usual 5 cruises one would need.
Have you cruised before with RCI?