That’s a super personal decision. One nice thing about Concierge class is the embarkation lunch in the MDR, as well as being on a higher floor, but whether it’s worth it to you is something only you can decide.
For example, on our AK cruise last May, we won a Move Up bid from Oceanview to Concierge for $225 each, and it was 100% worth every penny considering we only paid $399 each for the Oceanview to begin with. On the other hand, we very likely wont be putting in a move up bid (if available) for our upcoming NZ cruise since we’re in a sunset veranda on Edge and don’t want to give up our aft cabin.