Kindle Paperwhite Signature Edition review: The upgrade is worth the money

The Kindle Paperwhite Signature Edition, despite the fancy name, is a simple device. It's exactly the same as the new, fifth-generation Kindle Paperwhite, but it costs $50 more and has four upgrades: 32GB of memory (up from 8GB), wireless charging, an automatically adjusting front light, and no ads.

Since we already...