This really is a one-click installer, which is excellent. As far as I know it's the first and only one for M1. It's quite a polished UI, but there are a lot of features missing. The first ones that come to mind are:

- No way to specify a seed. This is an important part of SD workflows, letting you redo an image with a slightly tweaked a prompt.

- No way to specify a custom model. Alternative models (such as Waifu Diffusion) are fun to play with too.

- No way to generate batches of images.

- No way to specify which sampler to use.

- No way to adjust the weight of specific sub-phrases, or use negative weights.

There's also no img2img yet, but it sounds like that's a planned feature.

Other GUIs such as https://github.com/sd-webui/stable-diffusion-webui, https://github.com/AUTOMATIC1111/stable-diffusion-webui have many more features - but not all will be trivial to port to M1.

P.S.: For the people asking - yes, it can do NSFW images. I checked.