I changed from the Petra KM30 for KM 45.01 because my very pleased with the milk frother, unfortunately the work is not really actually comes only hot milk out, not a real foam. So if I want my latte macchiato I have to prepare the milk foam separately. Otherwise, it works quite well. It is nice that you can adjust the cup size. I hope the first time to descale it survives well, because that is my first Petra has given up the ghost. Unfortunately I can not give more points because the machine promises more than it delivers.