I have one of these convection ovens at my home and it has been a while using it.
The oven cooks on the principle of convection heat transfer and cooks the food well enough. But sometimes it cannot judge about the timing and temperature of a few meals and over cooks them.
There are a few issues during the use course like power some times goes off and switches on unexpectedly. We called to service center but hardly any one came, then we took it on our own for fixing problems but it was expensive. I would prefer to go for LG or other brands.