Our family likes hard-boiled eggs, and since we did not have a machine that does it, and this was so reasonably priced (and from Krups, which we have had very good luck with) we decided to give it a try. The machine is very simple to operate: measure the amount of water in the flask supplied according to number of eggs and type of cooking (soft,medium,hard boiled), pierce the eggs with the needle on the bottom of the flask, put the top on and go. As I mentioned, our family prefers hard boiled eggs, so that's all we've tried. The eggs come out perfectly no matter how many we make at one time. Careful, they are very, very hot. There is a small amount of cleanup on the base of the machine after boiling but it is easy with a small amount of soap/water and a non-stick scrub sponge. You can also poach eggs with enclosed inserts, which we have not tried yet. Overall, we are very pleased with the simplicity and speed of this egg cooker.