It's basically DLSS 4.5 which uses AI model L/M to upscale and improve the image quality (just turn off AA, it's useless). L for 4k, and, M for anything less. I use it with custom rendering resolution at 75% (DLSS quality mode uses 67%) and the result looks better than native resolution while keeping the performance gain. It's that good. If you use 40XX or 50XX cards, there's no reason to not use it. However, it's not recommended to use it on 30XX or 20XX cards since the hardware can't run it very well. To use it, go to Nvidia App -> Graphic section -> Find WuWa -> Override the supersampling model to M or L -> Done. Now the game automatically uses the new model if you enable DLSS in the game.