So far I love my Oasis2 received yesterday. I see no screen/lighting issues, it seems perfect to me. Some of the settings are not quite as intuitive to me even though I've used every e-ink Kindle since the K1, but I am reading the User Guide.
I did immediately buy out of special offers. I just prefer not having that extra swipe and using a magnetic cover to automatically open to whichever place I've left it. I haven't settled on a name and I've only downloaded one book to get used to new things. It's in a Fintie shell case; definitely heavier than my Voyage in a similar case, but I'm okay with that. I still prefer a covered Kindle and this one offers protection as well as folds back which is more a "real book" feel to me.
I didn't have any trouble changing defaults to my preferred font, size, turning off popular highlights, connecting my Wi-Fi, etc. I was able to download the collections I wanted on this Kindle, but can't seem to find the books to download within the collections (even looking through All). The collections show the correct number of books in the collection, but the number downloaded remains at zero. I wish books already collected started downloading with the collection when you add it to a new Kindle, not just the collection name. Am I doing something wrong there? I currently have the buttons set as bottom for page forward, top to page back, but the more I'm using it I think I will probably switch those around based on where I seem to comfortably hold it.
The main drawback that I have noticed is the lag time for the screen to wake from sleep or when changing back to the home page, getting the top menu to show within a book, etc. It's not a deal breaker by any means, but it does not seem to be near as instantaneous as prior Kindles.
I haven't checked yet what the latest update number is, but I think I may have one update to make. After the last update to the Voyage that gave us bolding sliders, the main difference that makes me happy with the O2 is the slightly bigger screen size. I would probably have been content with a new Voyage to get rid of the multiple shiny pinholes on my current Voyage screen, but DH listened to my pleas and ordered me the new toy I asked for!
If I have any change of thoughts as I use the O2 more, I'll let you know! I would currently grade it A- and definitely a keeper.