The vizio Vz K201 is a smooth running tablet with a good ui nice reaction time and it fits well in your hands. I like the hd design and how the apps seeminglessly tranfers from app to app with no lag or stop between the sytem. Theres no lag sd card conpatible and easy to use. I refer it for a good cristmas present or birthday gift for frie ds or family alike. Out ot 10 I give it a 9 stars .