1. **Picture Quality**: The SAMSUNG QN90C boasts Quantum Matrix with Mini LEDs, delivering exceptional color and contrast. Users report crystal-clear images with vivid colors and stellar brightness, making it ideal for both movies and sports.

2. **Sound Experience**: The included HW-S800B soundbar offers a true 3.2.1ch sound with Dolby Atmos, providing an immersive audio experience. Many users find the sound quality superior to other TVs, though some recommend additional sound systems for bass enthusiasts.

3. **Design and Setup**: The ultra-slim design of both the TV and soundbar blends seamlessly into any room decor. Setup is straightforward, with quick app logins via QR codes, making it user-friendly even for non-tech-savvy individuals.

4. **Performance**: The Neural Quantum Processor with 4K upscaling ensures sharp resolution for all content types. Users appreciate the fast boot-up time and smooth operation of apps, though some have reported issues with HDMI connectivity and audio output switching.

5. **Viewing Experience**: Anti-Glare technology and Ultra Viewing Angle ensure a consistent picture from any angle or lighting condition. However, optimal viewing distance is crucial to fully enjoy the 4K experience.

6. **Customer Service**: While many praise the quick delivery and price matching service, others have faced challenges with Samsung's customer support regarding technical issues.

7. **Value for Money**: Despite being on the higher end of the price spectrum, most users agree that the SAMSUNG QN90C offers great value due to its superior picture quality and advanced features.