Absolutely delicious and easy to make cake! I made using a no-sugar added (splenda sweetened) apple pie filling. I didn't have medium eggs, so used 3 large and had to mix in some vanilla yogurt to the sour cream to have enough. The only problem I had was that some of the butter leaked out the bottom/side of my springform pan onto the (newly-cleaned) oven! Definitely recommend this recipe--the topping makes it spectacular!