Well pleased with this product...however, there can be a burned smell transferred to the water if you let it automatically shut down. Also, some residual chlorine is also passed if using tap water. The burned smell can be eliminated by using a timer as shown set to about 3.5 hrs. You can pre-boil the water using a glass lid chosen to fit and boil for 5 minutes or so to eliminate the chlorine. Alternatively, use water from your fridge if it has a charcoal filter which is what I do. The additional energy to heat the cool water is marginal compared to what is used to boil it. You can also use the activated charcoal filters provided to remove the off-odors but they will need periodic replacement. White vinegar works great for cleaning. Don't scrub, just let a quarter inch sit on the bottom for a half hour or so. More time if cleaned infrequently.