The optimal weight is about 0.6-0.8. I also recommend using AfterDetailer for better results. Here are the appropriate parameters if you don't know what and how to configure: Inpaint denoising strength - 0.4-0.5 / Mask erosion - 50-60 / Mask blur - 6). You can leave the rest unchanged. This model has been trained on 512x512 images, but nothing prevents you from using a different resolution)