The very first espresso machines worked on a steam-pressure basis, and they’re still in use today. With this type of machine, steam or steam pressure is used to force water through the coffee grounds and produce espresso. Some steam-driven machines can produce a measure of foam “crema.” But they can’t generate enough pressure or provide the precise temperature control necessary to produce true espresso: They simply make a very strong cup of coffee. However, they cost considerably less than pump-driven machines. Our verdict is that if you’re a true espresso lover and seeking to make a good shot at home, we recommend you steer clear of steam-driven machines. They’ll likely disappoint you.
I only have one minor quibble with this machine; if you like cappuccino, it produces foam that is weak and deflates easily. I have troubleshot this problem from every possible angle (tried different percent milkfat, different milks(soy), different milk temps etc.) and the results were still a little disappointing. I purchased the Milk Frothing accessory designed for this unit and still could not produce the more velvety foam I was seeking. The easiest fix for this is to buy an Aerolatte: steam your milk with the F9 (the steam function works great) and then whip till your hearts content with the Aerolatte. For an extra $15 bucks spent on the Aerolatte, you'll have the perfect cup of cappuccino to rival any cafe.
3) This machine is crazy smart. It knows exactly when to clean itself, or tells you when to start the cleaning cycle. To clean it, all you do is insert a tablet in the coffee powder drawer and it does its thing. It knows when it needs water, when the filter needs to be changed, etc. In fact, since we have a water filter built into our refrigerator, we just use that filtered water in the coffee machine and therefore we don't need to use the expensive water filters. Bottom line, if you just pay attention and clean the machine on a regular basis when it tells you to, this is a no-brainer machine.