It's my only ereader after owning a paperwhite for years. Yeah, it's inferior. It sometimes doesn't register a several good, honest tap or swipes to turn pages ; it's having hard time making a difference between a swipe to change illumination and one to highlight text ; and sometimes you see some shadow text from other pages on your current page
But kobo do sell some books without DRM, you can sideload without even using calibre, and, most importantly, it's not an amazon product