Had it for only a few hours but first impressions:
- size is perfect for carrying around all the time. The iPad does feel too big for carrying after using this thing for as much as an hour. My retina iPad 4 is either getting returned or relegated to heavy processor tasks like video processing and retina display tasks like photo editing, comic book reading, etc.
- it's very speedy for basic functions. No lag time. I haven't tried the more demanding tasks and programs yet.
- display: eeeehhhhhhh. I can very easily see people who are used to retina being salty. This things not perfect, and really the display is the only reason I've found so far to say that.
- I'm already "all-in" on the apple ecosystem so having everything in my life sync'd up and being able to carry this thing around is a huge plus. I would never carry around the iPad 4 all the time due to device cost/safety/size/feeling stupid whipping it out In a coffee shop. Despite being still kinda costly, this thing seems ok for all of that.
- iOS flexibility overall for entertainment: with this I can have my kindle/nook/amazon video and music apps and not have to make a decision- if a movies cheaper on amazon or a books cheaper on the nook I can actually shop and not be dismayed by being stuck to one brand like I would the nook HD or kindle fire HD
All in all I like it. I'm an apple dork though so take this for what it's worth.