Edit: v1.8 auto failing download bug fixed in v1.10
Still would prefer this to work more like "Downloader for OnlyFans" add-on where there are custom download buttons embedded onto the feed because re-installing Patreon Helper loses track of what's already downloaded.

It has worked well with creators that had 500 total images or less and averages 20 photos per post. I've had problems with two creators. First one has a total of 11k images and average 30 photos per post, the add-on will download the first 15 or so post but then it won't download anymore even if I refresh or load more posts. Second one has 200 total images and has one image per post, it seems they upload different photos with reused filenames which I think messes up the add-on. It will skip photos and eventually stop downloading them. The add-on only seems to work on your homepage feed or creator's profile feed, not on individual posts (patreon.com/posts/ domain). These limitations might be because of how Patreon works and not the add-on but hope some can be worked around.