Really an awesome tangible technology. I never expected such a brilliant piece. Real time execution is much better than my expectations. Never think twice just purchase it. At speed 5, you will get the Speed of Normal fan at highest speed. So, NO DIFFERENCE IN SPEED. What else you need!!. Just think wisely. While, we use around 10 or 12 hours of fan in a day. It is wonderful thing, control your fan through mobile. Schedule the speed of fan according to requirement. You can even plan to schedule speed of the fan according to humidity. For old person this device is boon. The extra amount that you pay is worth considering ease of life it provides. So chill and purchase it. If you like my review, please vote it with Thumbs Up.