As others have said in their reviews, in order to prevent food from burning in the oven, it requires either continuous attention or changing the perforated blade with one without holes that leaves space on the right and left for better heat distribution. Otherwise, it is very efficient and economical in gas consumption. I highly recommend it.

With the change of the perforated sheet metal at the bottom and by adding a few holes, leaving about two fingers empty on the right and left, it bakes excellently. Otherwise, it bakes unevenly

Good and practical the small oven, but with a serious disadvantage. It does not have a good distribution of temperature inside the oven, the food burns in the middle of the tray and the temperature does not reach the sides properly.
By coincidence, I happened to have a cheaply made gas stove, with the same surface inside, and I noticed that the metal sheet covering the bottom burner of the oven has openings only on the sides and not in the center. Also, the two parallel nozzles of the bottom burner of the oven are more distant.
In my attempt to improve it, I placed a small tray identical to the oven tray on top of the metal sheet of the bottom burner of the oven, and the heat distribution improved significantly.
There may be other technical problems that I, as a simple observer without much knowledge, cannot understand.