....
Once upon a time before the 'Mk1' kit was launched, Andy and I discussed something equivalent for my GTI and he was keen to persuade me to move or reduce my battery then. It's what killed it for me as I think it's not practical for running a modern car unless you have a battery recharger in your garage at home and I wasn't going to sacrifice part of my boot for a battery, even disregarding that extra expense.
As always, it's horses for courses and this Mk2 kit will be great for some people. I'm getting 20bhp extra since installing my Forge Twintake's eye-candy, so I'm happy.