Atom is clearly an early look at a new code editor and much work remains to be done to produce a good community, a wide array of plugins as well as improving upon the performance of the product.

That aside, GitHub clearly cares about this product and is working hard to produce something that may well be great. Feedback has been responded to promptly and updates are rolling out to address issues.

The process of producing and publishing plugins is very smooth with a good set of tools to assist in the progress. Documentation is still in progress.

There are still performance problems with larger files and really large files can't be loaded at all. However, this is still a beta, so it remains to be seen what happens here.