Ranked in these QuestionsQuestion Ranking
Pro Extremely comfortable to hold
This is the most comfortable Kindle to hold yet. At just 4.6oz, it feels very light and because the back isn't flat (about 1/3 of one side is thicker), it feels better to hold in one hand as the weight is mostly along that edge (the center of gravity is held right in your one hand). You also don't need to worry about where you put your thumb as much - the 'spine' has ample room to rest your thumb.
Pro Physical page turning buttons
The Kindle Oasis brings back physical page turning buttons after previous Kindles which didn't have them. On that 'spine' edge are are dedicated page turning buttons that physically stand out so you can find them even in the dark. These buttons are rather clicky, and feel high quality.
Pro Very good battery life with the cover's battery
On it's own (without the cover), the Kindle Oasis will last around 4-5 hours of continuous reading which isn't anything special (Amazon claims 2 weeks). With the official Kindle Oasis cover attached, this time is extended to 20 hours (Amazon claims 8 weeks) - which is a really good result.
Pro Includes a handy leather case
The leather case is odd at first as it doesn't cover the whole back (it covers the thin section but not the thick 1/3) and wraps around the front. It adds functionality though - it includes a battery which helps you read for longer. The case attached magnetically through pogo pins so there's no locking/unlocking required.
Con Cover can't charge separately
The only way to charge the included Kindle Oasis' cover is by attaching it to the Kindle and charging them both at the same time. It would be handy to be able to charge the cover separately, although then it would need a port which could be more susceptible to damage.
Con Noticeable lightbleed when reading in the dark
Along the 'spine' side, there are 10 LEDs which provide the backlite for the Oasis, and you can see them pretty clearly. This is more of a cosmetic issue than a utility one, however it can provide a distraction until you get used to it as it makes the screen appear less uniform.