I find it can be as useful as cahtgpt4 for noodeling on technical things. It does tend to confidently hallucinate at times. Like my phone auto-corrected ostree to payee, and it proceeded to tell me all about the 'payee' version control system, then when i asked about the strange name it told me it was like managing versions in a similar way to accounting, and the configuration changes were paid to the system..
It's much harder to get it to go off its script stylistically I found. When asking to emulate a style of text, it still just gives you the same style it always uses, but adapts the content slightly. The length of response, and formality are parameterized options, so maybe its less responsive to the prompt text about these things.
I also found it will parrot back your prompt to you in its response more verbatim, even if it would make more sense to paraphrase it.
like "tell me what a boy who is lying about breaking a window would say" boy: "the lie I will tell you about this window is I didnt break it."