It's pretty goood for me. It's saved me literally thosands of hours of work already. I ran a bunch of problems from Leetcode into it, and it got most of them right.
Here's the b+tree implementation it gave me. I haven't checked if it's right. But, I was just curious what it'd come up with.
It’s good, don’t get me wrong, but if you go deep it’s usually incorrect somewhere.