I couldn't agree more.
@adslmax, do you actually remember the misery your last G.fast service caused you and why do you think this one will be any different?
I also can't understand why you need two services into your house when you were both managing perfectly well on a single 80/20 VDSL connection.
As you have said it's your money and you can do as you want with it but my opinion is that this is a total waste.