The Amazon Kindle Oasis officially was released today. However, if you did not pre-order it, you will have to wait until June because they are back ordered.
Virtually every review (and I read seven of them today) is the same. This is the best Kindle, and probably the best e-reader available. It is lighter and thinner than the last kindle. But that is true of all new kindle releases.
All reviews also say this is very hard to justify given the fact that you can buy a brand new Paperwhite Kindle for just over 1/3 of the price, or a refurbished Paperwhite for less than 1/3 of the price.
The best line I read was from a review on The Verge, “This is the kindle you will want, even if it is not the kindle you should buy.” Pretty much everyone agrees that the odd design feels good to read on. And most comment about how it is nice to have actual page turn buttons back. Most have not tested the full range of the battery yet because it is brand new. And almost all of them suggested that it should have been waterproof (which is my main complaint.)
Reviews: Wired Review, CNET Review, The Verge, Engadget, TechRadar, ArsTecnica, PC Mag, DigitalTrends