Okay, without a comparison, since I never saw a DX.
Overall, a very sleek design. Neither too bulky nor too heavy. You can hold in your hands for a while without getting tired.
Graphic main screen design, which is a new one for me. Much more like a compuer screen than a text-based menu as with the Kindle e.g. Touchscreen used with a stylus, as responsive as I expect it from eInk.
I was sitting in a not too brightly lit bistro restaurant in the evening. No glare, overall readability was fine. No pearl display, so the contrast is the same as with former models.
PDF rendering was fast and smooth, even for a Pocketbook device. This should really make the handling of magazine PDFs quite comfortable.
And, I hope they'll find a female text-to-speech-voice for the English version, which is as erotic as the German one.