Here are my thoughts, in no particular order. If you have any specific questions, I'm glad to answer.
My wife and I were thrilled to receive a call from the Apple Store in Tyson's Corner, VA yesterday at noon, letting us know that the 17-inch PowerBook we'd pre-ordered over a month ago had arrived.
Our first impression is that it's beautiful---the form is nothing new to TiBook owners, but it's new to us---and HUGE. The cause of its size, the screen, is gorgeous . . . we'd been using an iBook 700 and a Pismo 400, and the difference in brightness and color fidelity is remarkable. We popped in a DVD and were amazed at how good it looked. The sound is also stunningly good for a portable. For the first time, I don't feel like I'm watching DVDs on a laptop---the experience is much closer to watching them on a high quality flat-screen TV. In fact, if you hold the PowerBook at a comfortable typing distance from your eyes, you're not able to take in the entire display at one time. I found myself scanning the screen as the action on the DVD (Lord of the Rings) unfolded, much like you would at the movie theater.
The PowerBook is extremely solid, especially given its size and thinness. At first, we nicknamed it "PowerSlab," because it's just so much larger than any other laptop we'd seen, but it's weight (surprisingly light) and thinness team up to make it seem much less cumbersome than we'd initially supposed. The keyboard is a marvel---I have used half a dozen laptops with regularity over the past ten years (PowerBooks 165c, 1400, and G3 Firewire at home; Dells and Compaqs at the office) and this is, by far, the most well-designed keyboard I've used. Actually, "most well-designed" applies to the laptop as a whole. This is one well-engineered beauty.
It's fast, too. Really fast. I didn't realize it at first, perhaps because certain programs run slowly the first time you start them after installation. Tasks that took a noticeable pause on my Pismo are instantaneous. We installed a couple of games that were too graphics intensive for the Pismo and found that they started and played without a hitch. The iTunes folder is blank when the unit ships (remember when Apple used to throw in some music and speeches?), but once I moved our old mp3s over from the Pismo and iBook (via regular airport), I was able to appreciate the sound quality again.
A couple of nits: first, the battery life appears to be very short. I drained the battery, as recommended, then fully charged it. With 100% charge and a DVD playing, the "time remaining" never exceeded 1 hour 50 minutes. That's pretty skimpy, compared to my faithful Pismo. Another small complaint is that the keyboard backlighting is uneven . . . the top keys are very hard to see even with the highest illumination. While the backlighting is great in the "wow" department, it may not be quite as useful as I'd hoped.
Given the screen size, I had feared the possibility of one or more "frozen" pixels. I saw one, initially, but a little massaging with a Klear Screen cloth seemed to fix it.
Overall, we're thrilled and my coworkers are jealous. I'm hoping the battery life issue is a fluke, though. I do a good deal of traveling, and would hate to have to swap out batteries every two hours.
If anyone has specific questions, please feel free to email me at gregharris@[NOSPAM]stanfordalumni.org, and I'll be glad to answer them.