Do you read Twitter Threads daily?

If so, would love your feedback on our new site threadreaders.com. Basically our app allows you to unroll threads on Twitter by replying and @mentioning us and the keyword 'unroll'. We unroll the Thread to a webpage that's for easy reading, plus you can share it to multiple social networks. Additionally, you can Archive Threads and generate PDFs. If you enjoy a particular Author and his/her Threads we allow you to subscribe to them and receive daily emails of their recent Threads.

What other features do you think would be awesome to have? What do you think of the service in general?