I don't think anyone can really answer that yet. We thought about getting the wine add-on, but until someone reports back with information about the wine list for the plan I'm reluctant to book it. And since we're going in January, I don't expect we'll see many reports on it before we leave. So we're skipping it for this trip and anxiously awaiting information about it to decide if maybe we'll try it for the next one.
If you aren't big wine fans and haven't tried many, you're probably better off sampling wine by the glass at the restaurants you visit. That way you aren't paying for a whole bottle that you may or may not enjoy.