My computer's a few years old now, but I don't think it's too outdated. 12 core processor, 64 Gb of RAM, Nvidia GeForce GTX 1080. I find Superfly painfully slow, and the results unpleasantly grainy. I tried the denoiser, but then it looked blurry.

Maybe I just don't know enough about how to set up Superfly. For some reason, Superfly renders look flat to me. Either that, or overly bright, so the hair is blown out.

I do like some of the Dawn 2 renders Cath has posted. I think it's the hair. The hair shader she uses looks better than any I've found.