This is a direct replacement for a 20-year old Neff Gas hob, and happily, it fitted the existing aperture in the worktop and the gas connection was in exactly the same place, (Connected by a Gas-safe engineer, I hasten to add!) so no problems there.
It works perfectly, in fact probably better than the item it replaces, although it is not quite so robustly built, but probably doesn't need to be. Altogether, an excellent piece of equipment.