The device has thereby no German manual !!! The menu system on the unit is not self- explanatory. The plastic Nubbel-feet high are not equal, the device wobbles. I inserted the first egg today. My Green Leger put normal large egg - but 12 pieces are absolutely impossible and 9 eggs is really "toys" area -. Ok, was mentioned in the product description! I'm going to change the rating, the slip-result should be unexpectedly well. With my mother hen I had the last time 100%!