We are at WDW now, enjoying Poly Club Level. Last year we stayed club level at the Contemporary. Our family is in agreement that concierge at the Poly is better, but I know everyone has their different opinions about it. We really love the appetizers--especially the aloha pork sandwiches and the ribs! I don't remember the food that much at CR...
We don't use the concierge service much, but I have to say that they are some of the friendliest cast members anywhere. They're very attentive and nice. And most of the time there are 2 of them with NO lines or waiting!
Some tips: you can request some things that aren't "out." For instance, we asked for yogurt and milk and it magically appeared from behind the counter. I heard one lady request decaffeinated Diet Coke for every day of her stay, and the CM's placed an order for it. Other people requested a bottle of water to take to their rooms daily.
We LOVE the coffee machines! You just push a button and can get a mocha, cappuccino, etc. For FREE!

I don't remember that at the CR last year, but they might have had those machines, too. We're coffee people...
Breakfast isn't much, but it sure beats standing in line with everyone else... They have bagels, cinnamon danish, croissants, and various kinds of cereal. Along with milk and juice.
The alcohol in the evening is very nice. You can get a to-go cup and take it down to the beach (right out the door of the Hawaii building). Or you can watch Wishes from the lounge--it's a great view and, again, no crowds!
We LOVE the Poly Club Level!