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I think I want one for the novelty, but can it really make good espresso? I'm thinking it might be better suited for coffee beverages rather than a straight shot.

It seems extraction would be prolonged with an extended pre-infusion stage as the steam/hot water makes its way through the grounds.

Next question - If the water in the boiler is just enough for two perfect cups of coffee, where does the steam come from?

Nah, I don't want one.