I love my Xteink. It’s so small and lightweight I can take it anywhere. It runs fully on free software, and I paid close to nothing for the Chinese version on AliExpress.
I’ll use a bigger e-reader at home, and carry it to continue reading my book on the go. I have it for close to two months and charged it only once.
My favorite thing is that simply having it nearby showing the book cover is an invitation to read.