I, like many people, have become accustomed to having a fan on when I sleep. I have had a few other fans and most have not lasted. I bought two of these a few years ago and both are working like new. I use mine and my son uses his, every night on low when we sleep. All three settings work and the fan is as quiet as a fan rapidly moving air can be. According to my kill-a-watt, this costs me approximately 11 cents to run for 24 period on low. You can calculate more from there if you would like. My fans don't go into windows so they haven't seen a lot of moisture and i do clean them semi-annually. The only problem is like all my other fans, the legs that keep them upright on high broke long ago. I would recommend them as they run well and have pasted the test of time in my home.