I also tried the cool whip/cream cheese/pudding mix (chocolate) over the weekend. My family were my taste testers.. My husband who isnt much of a cake eater, ate it so fast, I was shocked! I used DH devils cake with the filling. I also tasted it and thought it was really good, although like "surferchic" said, it was very thick. I may try chocolate pudding instead of cream cheese. And the cream cheese didn't seem to mix in very well. I am not sure if I need to allow the cream cheese to come to room temperature. Either way, after seeing my husband and step kids eat up that cake so fast, I would have to say it is a Winner!
I also tried the "strawberry crema filling" My husband did say it was a little runny, but really good. He said I needed to stick to those two filling from now on. And my husband is my biggest critic!