Played with it a bit. As others have noted - Copilot definitely has a leg up and isn't all that expensive. Copilot supports more languages, it seems to do better with prompting based on comments IME.
I'm sure Amazon's offering will get better, but I don't really see much reason to move for now.
If it's not open source, it's not free enough to make a difference.
Which open source and/or local models have you tested?
I wonder, How well does it work and can it be integrated with JetBrains tools?
What do you think is the business strategy to go head to head in this market?