I am very frustrated by the performance of this machine. I want to love it because it is gorgeous, and there is no other machine on the market in the US with a design like this. So far, the only filter that actually produces more than a drop of espresso is the two cup dual wall. I have adjusted the grind size but with the other three filters, only like 5 drops or nothing comes out(!) and then the unit depressurizes and all the lights blink. I have wasted so many quality espresso beans just trying to get one shot and only a few drops in the cup arrive! I have to always revert back to the two cup dual wall filter even if I am only pulling one shot. Also, the water is not very hot. There is no clear way in the app to adjust this. I am not seeing substantial crema either, just a thin layer -- crema is a main driver to invest in a higher price machine. Why is this happening?