Unlike some of the newer models, Sony’s Digital Paper devices do not have frontlights and they only support pdf format, but Sony’s hardware is really nice and the writing experience with the stylus is more Paperlike than most other devices.
Sony recently released a software update that adds some much-needed features, like being able to jump to specific pages and navigating a file using the table of contents. The update also reportedly improves the latency of the stylus by 30%.
Sony’s DPT devices have 16GB of storage space with 2GB of RAM, and a quad-core 1.2GHz processor. They have WIFI and Bluetooth for transferring files, but there is no internet access.