Having used it in a week, I find Webstarts to be very easy to use much more than other web builders I have used before. On top of that all the features are really good, online shop, free stock images, blogs, SSL, designer platform. The ability to design the mobile version on its own is also incredibly useful to make sure websites look great on mobile. Website loads very fast too every with having a lot of images. Easily the best builder! Well done team!
There are few small issue like the editor having glitches, SSL certificate showing as insecure on browsers, limited payment option. But the Aaron and the Dev team quickly resolved it,
One major downside it that I can't use subdomain to point to the site, hence the 4 tacos. Really hope this will be enabled in near future