Have anyone used 招待日和 perk that comes with platinum cards here?

I only see a 9y old post in reddit, and in normal google search also, the actual experience posts are hardly one or two.

So, the perk is, the card holder is free when you dine at a high-end restaurant with 2 or more persons.

The restaurants looks very expensive, but I cant confirm the exact offers as I am not the member yet.

If anyone here has tried it, how was it? is it difficult to book a seat if you are eating for free?