I regularly use Reedy through PhoneCast (Samsung GearVR) to read epubs, and the RSVP works good as well. Reading goes almost as well as on my e-ink e-reader with the advantage that I don't have to hold the reader. The resolution on the GearVR is slightly higher then on the Rift, and that pays of while reading. The GearVR is quite heavy though, so I don't want to wear it for more then 30 minutes.