I first learned about Maxi Blocks about six months ago and have been following the progress of the project, so was excited to see it on AppSumo and immediately purchased. I've tested the free WordPress Maxi Blocks plugin and it is solid and full featured. The pro plans provide access to the huge library of predesigned templates and patterns. The style cards make it easy to change styles across all the blocks at once. I've had good interactions with the team, who have always been helpful.