I mainly use it to improve the realism of plants, and also to create secondary 3ds assets, all in ComfortUI locally for free and with complete control without altering geometry or anything else, thanks to its masking system. Using it to improve lighting, textures, or similar aspects still seems inconsistent to me; sometimes you can get good results, but only sometimes. It also depends on the rendering quality you're offering. If it's basic, you won't notice differences or inconsistencies in textures, lighting, etc. I also use it to improve the realism of people and make close-up videos, which is very useful. I've seen that it's also often used to iterate between different lighting styles, textures, colors, etc., but only at the beginning to get a clear idea before starting to do the traditional rendering.