Never had one, need to buy one for mother. Will need to cook food in good quantity for at least 3 people. For example 3 medium pizza or such. Few things I know that would be cooked are things like sweet potato, pizza, pasta, patties, cakes. But I don't know what all you can do in convection vs OTG. Also it seems in OTG you can cook multiple items but Convection is faster. Another I was thinking of getting OTG + simple oven. Some OTGs have digital display but most don't not sure if it would be really needed. Not sure what size to buy too. Was thinking of this https://www.amazon.in/dp/B01M04ZN32...d=2SL59KB23YQCE&psc=1&ref_=lv_ov_lig_dp_it_im but suddenly it has shot up from 7k to 10k and doesn't have a digital display too. I also can't find good company models above 30l, especially in OTG, where I could only find the phillips 27l one at 7k on Amazon. Of course, I can wait through the sale for better offer