Get to know the size and the uses, if possible, view the appliances physically. You need to know if you are comfortable using gas hob or induction hob. Older generation prefer to use gas hob as they can see and feel the strength of the fire, compare with the younger generation, which they like the clean look of the induction hob. If budget is not and issue ,you can combine both gas cooker hob and induction hob in your kitchen design planning,
When selecting the hob, you also need to look together with the hood. Hood is necessary as it create an element of a complete kitchen. Hood is always position above the hob, this help to filter oily fumes or smoke if one is doing heavy cooking or frying. There are also wide range of hoods to choose from, and always pick one that work effectively in the kitchen if you love to cook.