I hate the time unpredictability of it. Intellij also has AI completion suggestions, and sometimes they're really useful. But sometimes when I expect them, they don't come. Or they briefly flash and then disappear.

What would be nice is if you could ask for a suggestion with one key, so it's there when I want it, and not when I don't. That would put me in control. Instead I feel subjected to these completely random whims of the AI.