Just a note that $49.99 is the regular price they announced. It's not a sale for Black Friday or anything.
I don't think there have been any reviews since it officially came out today, but the specs are similar to the 7" Fire from Amazon (reg $49.99 BF sales many places for $33.33) with an equally low resolution screen. The screen should be on par with the old Nook Color and Nook Tablet, but not as high resolution as many newer tablets. If you're okay with that resolution for reading I'd guess it's a decent device (the 7" Fire is decent for what it is). Personally I prefer a higher resolution device for reading although I've read on the Fire 7 and other even lower resolution devices in a pinch.
There is a discussion thread here, but no reviews or anything...
https://www.mobileread.com/forums/sho...d.php?t=280869