My main platform so far has been extremely buggy too and is not even primarily made to create websites. I've been using Google Web Designer. Take my advice with a grain of salt as I represent hobbyist developers who thought "hey, i'd like to build a site. what tool should I start with?" I would not invest $200 to enroll in your intro course for something that gave me an initial first impression of being flimsy. However, it is equally likely that I am unable to realize the full potential of your product with my limited understanding of web development at first glance.
I'm excited about seeing how Macaw works and am going to begin a new project with Bootstrap soon. While my main focus has been purely static web design I plan to incorporate dynamic applications within my approach very soon.