They would be improved considerably if they had a fan !
Maybe later ones do have a fan but mine hasn't.
There's a challenge there for someone to fit one along the lines of the internal fridge fan and tell us how they did it !
Very strange thing happened with our TecTower over, eairler in the year the hinges were replaced since then the oven has been working really well, before there was no sign that the door wasn't sealing properly so really weird. The grill is still naff.