Upgraded from iPad v1
The iPad 1 has been left behind on iOS 5, so the move to iOS 8 is interesting; seems like lots of bling and things flying all over the place, thankfully this can be turned down in the Accessibility options (reduce motion). I'm not sure it really is any better than iOS 5; the application switcher is a lot slower and more intrusive.
I don't have a SIM yet; need to get to a shop (yeah, I could order one over the intarwebs, but if you don't use the shops, you'll loose the shops...). The damn thing keeps prompting me to set up a "Cellular data plan", which is just annoying and it seems you can't turn it off.
Without the case it's too slippery to hold. Wasn't impressed with Apple who shipped the case & iPad separately a couple of days later. The iPad leather case doesn't fold particularly well as there's only 2 folds and it slips flat if you nudge it (the iPad 1 case is much more effective).
All in all, it's a much faster and less crashy than the iPad 1, but pretty much does the same thing -- and still crashes when browsing. It's a little lighter (600gms over 880gms), but so what. The screen's a bit better being retina, but the screen on the iPad 1 was very good. To be honest, the iPad 5 (aka Air 2) is an incremental upgrade.
Disappointed that it still crashes, also I'm not overly enamoured with iOS 8 - seems like they've replaced skuomorphism with irritating popups.
The 'killer feature' and main reason for the upgrade is the Touch ID which means I can use a much stronger password.
7 / 10