Yes. I had Kindle DX (2010) and Kindle Paperwhite (~2016?). I still have and use Onyx Boox Air (2?). As X4 has no touchscreen layer and no backlight, the contrast is best. Resolution not as good as Boox, but no complaints there. The only downside is no backlight, but not a problem for me. Buying a new eink reader I would for sure avoid color screens. Their contrast is worst by far.