The qualities I care most about are:
- The ability to export my feeds
Feed Wrangler and The Old Reader offer search but neither is as fast as Google Reader. Feed Wrangler allows for only one search term at a time although the developer hopes to expand the search capability. Newsblur and Feedbin don't offer search at all. All the services I tested offer a way to export subscriptions except for Feedly.
The speed and search capability of Google Reader and all the stats it provides make me appreciate what Google has made available for free. No one does search the way Google does and Google really delivers on speed -- with all its products.
I'm not sure what I will use but I think I will rely more on Twitter and less on RSS after Google Reader leaves the planet. I just haven't found a true replacement.