At first we thought ours was defective, because it had to be primed (letting water flow through the steam wand) after every brew cycle, and the front knob wasn't working. After using it for a week with these problems, it seemed to fix itself, I guess it just needed to be "broken in". But we ended up sending it back anyway, and the reason was that when the grounds emptied into the grounds hopper, it leaked quite a bit of coffee into the drip tray. Well, we found out later that this is something that happens with every automatic espresso machine, and I personally think it's just too irritating, and doubt I'll ever get another automatic espresso machine because of it. If anyone knows of an automatic espresso machine that does not do this, please respond to this review. Other than that, it was a fine machine, and I would recommend to anyone having initial problems with it to use it for at least a week and see if they don't go away.