(Read the model description) - I don't know if its good so I marked it as "testing". You can try if you want or you can stick to v3 or v2. If you want to use it, I STRONGLY recommend generating at 1344x1728 (gives the best results) or 1728x1344. If its slow for you, generate at 896x1152 (gives the best results) or 1152x896 and use hires fix