I bought this for under my desk at work to keep my feet warm. It certainly serves this purpose and no more cold feet. Performance I have no complaints with the performance it provides very warm air with just the right timing going on and off. Ease of Use It is very easy to use nothing complicated about the features on the product. Durability I have had this for a little over a year now and it operates the same way as the first day I used it. Design I like the compact feature it is small enough to keep under my desk and doesn't get in the way of my footrest or computer cables. Safety The product is as safe as any other mini space heater I have owned. I do always remember to unplug before I leave for the day.