Non-technical founders building with Lovable or Cursor, how's it actually going once the product gets bigger? (I will not promote)

I'm a non technical founder and I keep seeing the success stories but not much about what it's really like day to day. So I'm curious to hear from people actually in it. If you've been building something real with Lovable, Bolt or Cursor, how's it going? A few things I'm wondering about specifically: How useful are they once you're past the first couple of screens? Does it hold up as the product gets more complex or does it start falling apart? How hard was it to get the hang of? I'm curious where people go