Sandisk pen drives helping functionality is fair but not at all durable due to of its poor plastic cover of the pen drive it will be useful for longer time because the pen drive will broke its use pin in no time. yes it all user friendly and also have the feature of ease installation it really do function well and very much faster in grasping all the data which we want to install. as all the pen drives are manufactured to carry data easily but it can have an addition features like for example embedding small devices like LED, fan, digital displays etc., the service should be improved by replacing the cheap plastic with some other material to have reliability and durability of the product.