We have only had two CL stays, one at WL and one at YC.
Our WL CL stay was absolutely fantastic! Everything was truly top notch from the cast members, the food, the lounge, and our room/Mousekeeping. That was back in July 2012 and it was our 1st Deluxe stay (let alone CL), so there was a lot of anticipation in that stay and they really delivered.
Stuff we loved:
1) IPO, who we didn't actually have make us any reservations but we loved being able to call them and have a human being pick up, not an automated system.
2) CL CM's, we had a 10 night stay and they really got to know us. They could see that DH had a preference in his beers, but that we often got back too late at night for him to have it, so they would stock our fridge while we were out. Same with our oldest DD, she was in love with the chocolate chip cookies, and on our last day, Randy, the awesome mgr up there personally went and wrapped up some cookies for her, for the road.
3) food selections, at WL, we had chili, meatballs, chicken wings, chicken on a stick something or other, scallops wrapped in bacon...a really awesome variety.
4) our room, we had an awesome view of Cinderella castle and our Mousekeeper was amazing and left a billion towel animals everyday.
The whole experience at WL was awesome, but the more I think about it, I am wondering if it's just because it was such a different experience from our prior stays which had been at values and CBR. We also had a 40% off discount as well, so that we were only paying $249/night, which is a steal.
Now, we were at YC this past April and while we loved the resort itself, the CL was definitely in the "lacking" category. The food was just a fried something or other every single night...Mousekeeping was weird with the turndown service as they would come and do it around 3 pm, which is when we were usually taking a nap.

(WL did it at night, when we were out at the parks...which makes sense) Again, we had a 40%
While we would absolutely stay at YC again, we would not do CL there again.
Now, all this being said, we are booked at the Contemporary for next August, again with 40% off and while I was thinking about upgrading to CL, I don't think I am going to do it. I am grateful for the magical experience we had at WL, but I do realize that we don't really get our money's worth in CL.
Even the wines that they put out are pretty cheap, standard wines, and I am kind of a wine snob so I won't drink it. (and this was at WL and YC)
I think it's fun to experience and I'm glad we did, but I'm not really sure when we will book CL again, as we have realized that we are kind of throwing a lot of money out the window. It's not to say that we don't like it, but I honestly don't think it's "worth it" for us in the future.
For the amount of money you pay, you should get exceptional, not mediocre.