The OS Tizen is very fluid and feels very lightweight. The remote control is small and ergonomic. Just a few buttons are enough to operate all functions of several devices including home cinema, cable set top box, PS4. Fantastic! Only lack a keyboard. Wi-Fi works great connected to my 5Ghz network using Netflix at 4K and other contents and never felt the need to connect the TV by cable. Now the reason for such low stars, THE IMAGE QUALITY! If you realise, the 55” version of this model has a PLS panel with a contrast ratio of just 980:1 which is astonishing low and bad. No matter the settings I apply, the image has always a washed effect screaming for contrast. Never seen a TV with such poor angle of vision. The only way of watching is being perfectly align with as if I move, just slightly sideways, the image immediately degrades and gets even more washed out. Forget about the cost/benefit, NOT WORTH IT AND DO NOT BUY THIS TV!!!!! If someone offer it to you, see it immediately, which is what I am doing now after 1 month of use.