I read on average 30-60 minutes a day most days on my Kindle Paperwhite that has been going strong since I got it Christmas 2013. It does have a small screen defect that results in a tiny spot of light, but it hasn't bothered me when reading.
Just out of curiosity, how did your Kindles fail? Did the Kindle stop working completely or did it develop a flaw in the screen that made it too difficult to read on?
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