I'll preface with: I have not hit publish with this option just yet but testing it.
I launched a mobile app last year with a no-code competitor.
You would think that with the rise of mobile, competition would be fierce yet it's not. A lot of no-code options leave much to be desired.

Things I immediately struggled with:
- User interface was not intuitive (not impossible, can overcome)
- Documentation has a lot of what I assume are SEO niche filler content that seems like just the headline and top keywords are swapped out which isn't helpful at all from a troubleshooting standpoint.
- The lack of linking options in the app are a problem. Only being able to link from the menu is immediately a one-taco kind of set back in how flexible apps can be built.
- Scrolling through the announcement tab, I see multiple past announcements of back to back LTD specials. It concerns me when a service does a lot of back to back LTDs. Makes me concerned they're constantly running out of cash. I would recommend expiring these posts from announcements if deals are not ongoing. I wouldn't upgrade if I could wait for 'the next LTD'.

What I like:
The menu options look a little cheap with placeholder icons but once you set up your basic branding options (very clean, all in one spot with universal settings for the entire app and the option to customize per page elsewhere in the app. This is 5 tacos) then your app quickly transforms. That's the goal, right? If you have a clear brand identity, your app really does come together quickly.

How fast is fast with this No-Code
The most common 'no code' apps are really pulling in information from already established services - a blog, an RSS, what-have-you and these set up pretty fast. I had my main website resources added with a clean mobile menu with my brand assets in under 10 minutes (for both apple and andriod, I like that it builds them both at the same time).

Live App Previews
While it was hard to find initially, the app preview being able to pop-over what I'm currently working on without having to be redirected to a dedicated preview area (messing up that creative work flow, forcing you to find 'where you left off' to make changes) is streamlined. I like that a great deal.

Documentation on the App Submission process - Above and Beyond
I can NOT overstate how sharp this documentation is. One of the most thorough step-by-step app submission documentation I've seen. Given that the service is no-code, this is catering to people that might not self-describe as tech savvy. This gives me hope that the placeholder documentation will continue to be filled out given time and resources.

Push-Notifications
I have yet to test this out but I'm very interested in push notifications being made easier. As in, the claims of being able to handle push notifications on both platforms sold me on trying this out. I have high hopes.

A request: features for locking/unlocking classes on a schedule.
Recommended as a no-code solution