Bought this in the shopping festival sale. Since we were buying a tv after a long time, we went for the 55", though the 49" version was a better deal (53k). But this was also quite a good deal (for 70k) compared to anything else in stores. 55" seems quite big initially but after setting it in the room and using it, it seems to be big enough but not too big. The picture quality is excellent. We were upgrading from 30" so more than happy with the larger screen and the newer display technologies. 4K content is still hard to come by but we checked some 4K videos on youtube and they were very good. Eagerly awaiting some high quality 4K movies on Prime and Netflix so we can give it the full spin. The sound is also quite good but we had some random volume change concerns. Its only been 2 days so will check it again and update if it persists. So far, we don't feel the need to add a home theatre system with this. We are primarily using the tv for online content so haven't checked it with any of the cable networks. Installation was pretty straightforward. Haven't yet installed the wall mount. Will do it over the coming few days.