Hello,
Sorry for the late reply. Odin is relatively stable. It is still officially in "alpha" as "beta" would mean only bug fixes and no new features/improvements.
I would not take my personal word for it but Odin is being used by many and is pretty stable. Bug fixes are usually fixed very quickly too.
A new release will be coming soon with a lot of new features, including debugging support!
If you have any other questions, please feel free to ask :)
- Bill