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I'll chime in on the no regrets side. Before the iBook (had it for 4 mos), I've used work laptops with 13-14" screens and I have no regrets on the 12" vs. those, or vs. the 15" desktop LCD on my PC. Actually, my first laptop was a Compaq Pentium 150 with a 10.4" screen. This was when XGA laptop screens were relatively new, and I was a relatively impecunious grad student. It had a trackball, and only a built in floppy drive, but I *loved* the form factor....

I guess the only thing I'd add is that if there were a 13-14" widescreen option that had significantly more pixels, I'd reconsider. When I was laptop shopping, all the competitors were PCs with Celeron / WS. But I definitely love the <5 lb weight. For me, the combination of features at this weight is great vs. a heavier notebook with a larger screen or a lighter one w/o the built in drive.

Let me add one more suggestion...how big is your desktop monitor, how high do you run the res, and do you use relatively small or big system fonts? One thing you ought to think about is whether the density of pixels on the 12" is much smaller than you're used to.
 
Personally, I value portability over screen real estate, so inevitably I'll say it's just perfect for me. The 12in screen, even disregarding overall size - tiny - is a fine screen for most people, certainly for me. Factor in portability - which was THE factor for me - and the 12in screen actually becomes an asset. A screen this big in a package so small? It's all relative, I guess.

Anyways, I have absolutely no regrets :)

2 Days old and loving my PB G4 12in!

andy
 
Thanks for all the comments. I really like the portability of the 12", so this helps my decision!
 
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