Just tried it out. I usually use Harmonic, and in general I much prefer the UI - it's more minimalistic, lower contrast, and I prefer the font (Product Sans). It also has a built in ad blocker. However, I appreciate the various filtering options / different feeds and the archive access seems like a really useful feature.
On the whole I think I'll stick with Harmonic, but it looks like it has some potential.
On the whole I think I'll stick with Harmonic, but it looks like it has some potential.