I've been for an anniversary and for a rare "all the sisters are together" dinner - and both times the cost was utterly ridiculous, and I didn't regret a single penny.
My recommendation is to recognize that the menu shifts in order to offer seasonal selections; and call ahead to find out what's on the chef's tasting menu. Get that, and if you don't like the sound of what's on it, wait a couple months and call back. Everything we've ever had here has been perfectly prepared, professionally presented in appropriate time frames, and utterly delicious. The tasting menu consistently offers a variety of tastes so that it's difficult to be at all disappointed.
It's not someplace I would *ever* consider not planning for; it's a lot of money and it's not just dinner; it's a commitment to an evening where you just concentrate on the food and the company you keep.