The person in the shop I bought my VBM from in Amsterdam claims that aluminium boilers are bad for your health. Apparently water and aluminium are each others arch-enemies. Water will cause corrosion and as a result you will drink aluminium with your espresso. And the machine is likely to break down after a couple of years because of the corrosion. That is one of the main reasons he doesn't sell Krups, DeLonghi, Gaggia etceteras. He only sells brands with copper boilers, with his all-time favourite being the VBM Domobar.
Can anyone confirm that aluminium and water do not like each other?
And is aluminium-oxide bad for your health?