It's a decent tool which helps to create a basic landing page or website. It has limited functionality and tweaking is not very smooth. UI is clean but need improvement in UX. But it's free anyway so it's great for the beginners.
One of the good things about this WYSIWYG landing page build is that making changes in HTML/CSS code shows instant live results on screen.
I played around a bit with the afflift landing page builder, I think its a great tool for affiliates especially as its free and i most likely will use it more frequently in the future
One suggestion would be to add some templates so affiliates don't have to start with a blank page although the drag and drop feature already easily lets one create landing pages starting from a blank page with a couple of drags, and for a free version templates might be asked to much, but its the only thing I can think of improving for now
Just judging from the amount of reviews it seems not everybody has tried this Landing Page builder sofar, I can only recommend everybody to play around with it a bit as its free, simple and fun