The iWork for iPad apps are all very well done. Nobody should expect them to be completely on par as their Mac cousins, but in some ways they may be better simply due to the touch UI. For all of the iWork for iPad apps, I would suggest viewing the sample document and then perusing the online help. Both are very useful and well done. Sharing files back to a Mac is OK, but could be better implemented and may come in an update to the Mac apps. I get the impression apple really wants people to use iWork-dot-com. All-in-all, though, the Work for iPad apps are certainly a bargain and will only get better with future updates.
Pages
A pretty solid and productive app. It is a word-processor, and a pretty good one. Though it cannot do everything the Mac version can (the Mac version has page layout, footnotes, and a few other things), if the user knows its abilities and uses a little creativity, the final result can be fantastic. Needs mask with shape. A few menus could be a little clearer, but once you discover things it's easy to navigate: editing text was a little hidden.
Keynote
Very well done app and the final presentations are amazing. Very straightforward UI. Though currently awesome, I would love to be able to record audio into the app and to be able to control it with a remote.
Numbers
Very good implementation and fairly easy to use. I did find a few things a bit funky, but I'm honestly not a pro-user of Numbers on the Mac either.
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SketchBook Pro
Awesome. A very good painting app for the low cost. One problem: exported images drawn in landscape show up in Photos rotated 90° counter-clockwise and cannot be righted unless imported into Pages or some other app. I see this as a weakness in both SBP and Photos.
Your = the possessive of you, as in, "Your name is Tom, right?" or "What is your name?"
You're = a contraction of YOU + ARE as in, "You are right" --> "You're right."
Your = the possessive of you, as in, "Your name is Tom, right?" or "What is your name?"
You're = a contraction of YOU + ARE as in, "You are right" --> "You're right."