I just got one for work
I finally got an iPad 4 (16GB) for work, my first ever Apple product. I'm a front-end developer and every client was asking for iPad compatibility and touch functionality so it had to be done.
Coming from using Google Play on a Samsung Galaxy S1 I found the Apple App Store to be pretty hopeless. I can't seem to find a decent program to allow me get files, like pdfs, avis and cbr from my PC or NAS (and possibly stream them) via wifi. And none of the decent Google apps seem available like Sky, Maps and Reader. If you've never visited a walled garden before it does feel pretty limiting. I'm sure I'll find some apps that will solve my issues though, I've only had the device for 12 hours.
The good news is that I haven't had to install iTunes on my PC yet and the iPad is still up and running fine. The amazing news is the screen. I've never seen a retina display before and it is quite breathtaking. Coming from an early 80's 8-bit generation I've seen so many improvements in graphic resolution but this seems like it's finally all been solved. To me it's like there's no need for resolution specs any more once you get past certain figures.
Battery life seems amazing too. After a few hours on it last night it was still at 82%. Unlike my much smaller Galaxy S1 which can run out of juice in just over an hour. Build quality is great too but there's something about the touch scrolling in iOS that just doesn't feel right compared to Android.
Now I just have to work out what's the best app to read PDFs, and get them from my home-networked PC. The Register app is quite nice too.
So overall, if it was my own money I was only going to purchase one tablet every 5 years I would probably go for a much cheaper Android tablet in about year's time. I think that's when you'll get an ideal product both hardware and software. The App Store offerings do seem a bit corporate and rigid, and if you're quite technically minded and/or don't usually consume media via iTunes you may find it too limiting.
But it's still an amazing product. And if you're happy to spend a few quid once you've bought it paying for some decent apps and your media then I think you're be extremely happy with your purchase.