Got mine a few hours ago and here are some snap impressions (+ means positive; - means neg; ~ means meh):
+ Once you got past the security hole that is having your Fire already armed with your account info, it's a blast to see all your Amazon content stocking the virtual shelves. Kindle books in Books; TV series I've bought in the Video Library and all the Prime streaming stuff; music I've bought AND uploaded to my Cloud Drive, etc.
+ It's built like a brick. The rubber coating should be tackier, but it seems OK. Looks like it'll show finger oil over time, so no eating Doritos.
- Power button is right where it rests on my fingers holding it one-handed, so I've had a few instances of it asking if I want to shut down. I'll have to grip it a different way. (That's what she said!)
- Not sure if the Silk browser can auto-format text to fit screen width. Initial tests have been disappointing with non-mobile sites.
~ It had an update right away adding Facebook and IMDB links to the Favorites shelf. They're just links to mobile pages and not apps, so big deal.
- The "coverflowish" recently used whatnot - video, books, apps all appear in a line - scrolls waaaaaaaay too fast.
+ Screen seems nice, but compared to my Galaxy S II's SuperDuperUber AMOLEDROFLBBQ PlusUltraMax screen, it seems a tad washed out. (Anything not SDUAMOLEDROFLBBQPUM looks bad, though.) Cranking brightness up for video is blinding. 2/3rd brightness seems OK.
+ Looked at a YouTube clip and an episode of Prime streaming Hottie Terminator and it looks sharp. Too bad you can't download episodes into the Fire (like Unbox) for viewing, but oh well.
- Not all of my A'zon Free App o' Day apps are showing. Don't know if they're blocking non-tablet friendly apps or what, but I added the free Kobo and Aldiko reader (for my non-Kindle e-books) and it's not showing. I'll investigate further. (UPDATE: It appears no other e-readers are available. Not cool. Changed to a minus.)
- Built in speakers are weaksauce and located on the top when in portrait orientation, meaning when watching video, audio is all on one side. (Plugged in a set of AKG K240 Studio phones and it sounded good without hiss.)
+ Seems pretty peppy with very few hiccups. I'd say it's smoother than my ASUS Transformer, but not as fast as the Galaxy S2 which runs like greased grease.
- - - - - - Not a problem with the Fire per se, but the Wired app is pure, unadulterated bovine excrement! Issue is 261 MB and doesn't download as fast as my connection should put it through. If you switch to another app, it not only doesn't download in the background, but you have to sign in to the Wired app with your email and password EVERY. FRAKING. TIME to get back at the issues screen. Amazon can send you a device ready to blow your credit card into smithereens out of the box, but Wired thinks you need to prove yourself every time?!?!?!?? If it had a camera, they'd probably want a retinal scan. What total Apple-sucking a-holes! Vanity Fair (202 MB DL) looks the same, so it's a Conde Naste (pronounced "condy nasty") thing.
INITIAL JUDGEMENT: It's going to take time to wring it out and the lack of alternate book readers - I haven't tried sideloading anything yet - is silly, but my initial reaction is quite favorable. My phone, even with a 4-1/2 inch screen isn't really suited for reading, etc. and my big tablet was too cumbersome for taking out of the house, so this feels Baby Bear to me.
===================
UPDATE #1:
- - File transfer speeds are very slow. Connected to home and work computers and copied comic books and videos and it takes waaaaaay too long for a USB 2.0 device.
- As noted in Ars Technica's review, user videos copied into the Video folder do not show up in the Video area, but are found in Apps>Gallery. WTF?!? I tried an AVI and it couldn't play it. 720p MP4s (copied from YouTube) play back fine. I skipped thru a 45 minute video w/o a hitch.
- - The lockout of reader apps that the Amazon Android App Store offers to other Android devices is seriously annoying. While you can roam the web and look for APKs and sideload them, it's stupid and not user-friendly. Knock it off, Amazon. (GetJar has nothing for it yet.)
+ Watching video is good and smooth as long as you have headphones for the sound. I just wish you could cache the streaming stuff like Unbox, but oh well. As long as you have wifi broadband, you're cooking with gas.
- To find out what percentage of battery you have left, you have to drill down Settings>More>Device to get at the readout. Weak and counter intuitive.