There are many good extensions with somewhat similar features, the ideal extension might come down to personal preference but I've been building double.bot [0] after spending months using Github Copilot and running into the same bugs over and over (wrote about it here [1]) and I think we've done a good job at building the ideal extension for professional developers.
[0] - https://double.bot/
[1] - https://docs.double.bot/copilot