So far I'm very impressed, although I acknowledge that I have run into bugs in the UI. (Replacing images for example, often resulted in the whole image selection pane to repaint, and it ended up jumping to a different point in the process, which was disorienting and frustrating.)

I certainly won't deny (small) problems, and I haven't had time yet to fully explore what it can do, but I think if you look at the big picture, you'll see that this absolutely has the potential to be a huge game changer.

First of all, you have one tool with both the ease of use demanded by complete newbs AND all the power that a developer is likely to want. That alone is a home run. As a professional web app developer, I welcome a tool that can make my job easier. The only problem with most tools I've tried that attempt to make building pages easier is that they have at least one of the following problems:
(1) they restrict you to templates that someone else provides
(2) they are too closely tied to something like Bootstrap (which I hate!)
(3) they produce garbage HTML
(4) they are not designed to integrate with a professional app developer's workflow.

As far as I can see (so far) Teleport has none of these problems.

Because it is designed to be usable by a complete newb, I can build web sites WITH clients instead of merely FOR clients. Of course larger clients will want me to do everything, which is fine, but smaller clients will want me to do only what they can't do. (And now if a friend wants a simple web site, I don't have to explain that that's like asking a builder to give you a free house.)

Out of the box this can integrate with React, React Native, Stencil, Gatsby, Next, Nuxt, and a bunch of other systems that I _might_ want to use some day. But as a developer I can add BridgeTown, Rails, or whatever I need. And THAT is really the killer feature. Unlimited integration and extension—or so it appears so far—coupled with the ability to collaborate live online with clients or colleagues.

If I'm wrong about how good any of this is, I have 60 days to downgrade to the first tier, or even to the free tier. But I very much doubt I will do that. I recommend you buy this while you can, even if only the first tier. I really don't think you'll regret it.