The first time I tried to roast a piece of pork, it worked perfectly. The second time I tried, while it was cooking the glass of the lid broke into pieces.
The oven was outside the main house when the cooking was on. I am not sure if the lid broke due to the difference in temperature between the environment and the oven. At the time the cooking was on, the outside temperature was around 18 Celcius.
I was not able to get a refund or an exchange because I lost the serial number which suppose to stick on the oven somewhere.