I made my daughters cake in this and it came out great. A few tips. #1 you technically only need one box of cake mix. Fill both to the half way mark. If you want to add more that is fine. Just make a second box and fill up 2/3's of the way. Use the rest of the batter to make cupcakes or something else. But only one box is necessary.

#2nd tip. Make sure the cake is completely cooled before releasing the cake. Place upside down while cooling. It will automatically release. The first time I did this, I did not let it cool upside down. After shaking and trying to get it to release - it did but it took...