It's looking like it would cost me a couple of hundred pounds more to get a flex zone on one side of a wide induction hob versus just having 5 defined zones - and I'm not sure what the benefit is meant to be? But then I have a rubbish electric hob currently, so not very familiar with any of this. Can I happily save myself some money, or will I be annoyed down the line at what the hob can't do?