The SAMSUNG 75-Inch Class Neo QLED 4K QN85C Series TV is a powerhouse of technology, offering features like Quantum Matrix with Mini LEDs, Neural Quantum Processor with 4K upscaling, and Neo Quantum HDR. These features promise an unparalleled viewing experience with sensational color and contrast.

Users have praised the TV for its quick delivery and easy installation. The color and sound quality are standout features, with many users expressing satisfaction with their purchase. The upgrade from older models is significant, especially in terms of contrast, glare reduction, and deeper blacks.

However, some users have noted that the built-in sound system is tinny and doesn't project well, recommending the addition of a soundbar for a better audio experience. The Smart TV features and UI have been described as cluttered and not intuitive, with suggestions to replace them with a Roku for better usability.

Despite these minor drawbacks, the overall build quality and materials are impressive. The TV's performance with built-in apps has been excellent once accessed. Users have also appreciated the seamless setup and control interaction with Samsung Galaxy devices.

In conclusion, the SAMSUNG 75-Inch Neo QLED 4K QN85C Series TV offers a fantastic viewing experience with some room for improvement in sound quality and user interface design. It's a solid choice for those looking to upgrade their home entertainment system.