I bought the double gas oven a year ago.  It's a nice unit however, after cooking 4 turkeys in the lower oven during the year, I can't get a turkey to cook evenly.  The top is overdone and the bottom is undercooked. Everytime.  Tried 4 different approaches, probe vs. no probe, adjusting the temperature and cook time, raising the turkey in its pan, etc.   I don't think there is anything wrong with the unit, there just isn't uniform heating and temperatures in the lower oven.