This unit is vary comfortable to use, vary ergonomic. Its almost a stealth vape but it is a little tall for that. For its size the wattage range is amazing as well as the display navigation is vary simple and easy to use. With its quick charge feature I feel like it never dies because its charged in no time! I love to use RDA's a few times a week and being able to just switch the mode and not have to change the whole unit is convenient.