This plugin has been closed as of 2022年4月26日 and is not available for download. This closure is temporary, pending a full review.
We use this on all our client's websites, and in my opinion it drastically improves the way that ACF flexible content works, by showing a visual preview for the user.
This works great. I have many custom tweaks done to the post edit page and so far I haven't noticed any conflicts. The only thing I wish was that there was a filter to adjust the image size so I could easily do 4 across instead of 3.