I would use it if the LLM they used were better. It keeps inventing files that don't exist. If I could just provide my GPT-4 API key so it can use GPT-4 I'd be happy.
They use Claude 2 as AI backend with a 100K context window. In my experience Claude is better at programming than GPT-4 because it has a much younger cut-off date and because of the context window to process knowledge.
Halluzination happens with all LLM's.