Not really a feature but I like the general look and feel of PieFed. I think the user interface feels polished even though it is still quite early in development.

mbin on the other hand just doesn’t feel as comfortable to use. The layout feels unnatural and the buttons are in unexpected places. Also I really dislike the unconventional terms such as “magazine” and “boost”. (I know they came from kbin)

I hope PieFed will keep the UI clean while adding new features. I am quite confident with the devs based on what I have seen so far.

Thanks for all the hardworking devs providing such wonderful applications.

Edit:
Expanding on what I like about PieFed:

• The "new communities" and "active communities" section on the sidebar are more useful than I expected.
• Killer feature: Grouping cross posts and viewing comments from different posts in the same view
• Voting is private. This gives me the peace of mind when I downvote a post from a snowflake.
• Instance blocking that works