I used almost 2 products of Nova brand and still the products are very bad because they brings low budget appliances so, now we talking about the user friendly, value of money and effectiveness so, first one is user friendly it is kind of user friendly but not toatly brcause it always stop working when you use continuous for 15 minutes and the value of money is nothing beacuse i’m not preferring any product of Nova beacuse the product is not good but if you want in cheap price then you might go with nova and the effectiveness it will effect when you use almost 20 minutes but the problem is you know very well