Another nice feature of Gastroback is that the button is a switch and one that does not have to hold down the whole time during foaming. It lies well in the hand and mediated by a solid metal housing a high impression. (I have to leave the device from the local Saturn, but a review on Amazon I find meaningful.)
Conclusion: Almost eye-opening Handaufschäumer. For me, the new standard against which henceforth will be measured in terms of other devices foam generation.