Yeah, but haven't tried it much. A1111 is so much more used, has 100+ extensions (like gallery), etc.
I'm having the same problem as you (blurry nothing during img2img infill). I can generate new txt2img no problem and they work fine, but infill does nothing. I've tried the various settings etc. and can't seem to get SD to actually generate anything within the infill area. Also have an AMD card (6950 XT).
Thanks.
This happens when you have masked hair and are using "original" as masked content.
That's up to you, depends on the situation. For NSFW stuff I wouldn't recommend the base SD 1.5 model, for other stuff "it depends".