i don’t take my kobo anywhere. I use the cover at home, because it has a strap that i can hold while reading. Also because it puts the kobo to sleep when the cover closes, which is nice.

I don’t like the extra weight, so no, I don’t use case at home. My reader of choice is Kobo Libra Colour, which has those side buttons so it’s easy to hold without any extra straps or such. Also, as the display is recessed, it’s less likely to be damaged, so I feel it doesn’t need extra protection. I wouldn’t put it into any kind of bag without a case, though.