I've tried all page builder plugins available, but none of them could cope with the themify builder. It not only provides the most options and possibilities of them all, but it does even in the free version. Actually there's not much you cannot do with the free version.
Tried it with a lot of different themes and it worked well with all of them, I'm using it for about six month now and the only other plugin that caused a conflict was a facebook plugin, but that issue was quickly resolved after a plugin update.
In the beginning it caused some minor errors, but they were all resolved after the last updates - now it works perfectly!
I'm using it with the Weaver Xtreme theme, both free versions - together they provide the most powerful webdesign possibilities ever!
Thank you so much for this great and free plugin!