It does occasionally freeze up, or, lose the WIFI network connection and needs to be rebooted. The picture settings are not like my plasma HDTV, where you set it and forget it. I find myself frequently adjusting the brightness, contrast and picture settings. Still, it's probably the best and lowest cost smart TV you can buy. Sound quality is great. It has a built-in CLEAR QAM tuner, so you don't need a cable box to receive your HD channels over cable.