I mean, I use DataGrip, but their AI specific tools is what I'm wondering about.
For a while I used Junie for small refactorings, and it generally does a good job, quite quickly. A couple of times I tried asking it for more complex things, and it didn't do well. I do find the UI to be a bit tricky, so it's quite possible I did something wrong or didn't add something to the context I was supposed to. Hopefully they sort out the "AI Chat" panel soon.
But now I use Codex/ChatGPT... and what it can do is frankly incredible. And it might just be me, but I do like having my AI chat UI completely separate from my IDE.