The timer is the most frustrating thing I have ever encountered on an oven and I have no idea how the quality department ever let this be sold. It came with the house but I would not buy this oven for the timer alone. Its a fun game I play when guests come to the house. I ask them to put the timer at say, 27 minutes and watch them struggle. After about 5 minutes of trying they give up. It also takes a long time to pre-heat.