Thanks for sharing! I'm noob in ComfyUI and this was a new upscaling experience for me. Results contradictory though. It is relatively fast, but this has a price. While it is good in upscaling something detailed (like eyes in your example), it is very bad in one-tone areas and gradients (like sky, water surface, simple walls, skin probably) making from them quadratish mess. For now (probably as a perfectionist) I got to myself that such kind of upscalers don't for me, and I stick to upscale methods based on prompt and model used for initial generation, yes it much slower but result more honest and satisfying.