Heats very efficiently!! We use it during the winter and it works great to either heat a room or take the chill off. Performance Heats a room very quickly! Produces hot air right away..no need to wait..has different settings for various heat levels. Ease of Use Very easy to use...a knob controls the functions..basic and simple! Durability We have used ours several years and have not had a problem with it at all. Very durable! Design Small sleek design..easy to move around...grab n go!! Safety Would like a bigger base to make it stand up better...If used on carpet, might tip over..we never use it without sitting right near it to keep a close eye on it...but vwe would keep a close eye on any heater.