Got the 2.4GHz 13-inch on Friday; first MacBook, second Mac in two years, second Apple computer since the IIgs.
-The display is fairly solid; not quite as good as the RGBLED backlight of my Studio XPS 16, but definitely above average.
-Build quality is way up there, too. The touchpad is pretty responsive in most apps (two-finger click is 50-50 in Portal) and the physical surface and inertial scrolling makes for smooth gliding. Feels similar to the brushed aluminum pad of the Adamo Thirteen with far more reliable multitouch.
-The GPU isn't too bad. A nice step up from the 9400M, although no discrete card. Luckily, Macs are pretty lame in the gaming department. (Not a large library, I mean; I have my XPS 16 - Core i5, 4670 1GB - for serious portable gaming, though its battery isn't so hot)
-Jury is still out on the battery
Some things I don't like so far:
Some really like the keyboard, but the keys feel a little small on the 13-inch MBP. I haven't noticed too much of a decrease in typing speed/accuracy, but it is there and I find myself missing keys more often than on my other laptops.
Still no Blu-Ray support. I had a 2.5 year old laptop with a BD-ROM drive and it was a mere $75 upgrade for my XPS 16 that replaced it. I understand that including decoding software raises licensing issues, but it should at least be an option (include those fees in the cost of the BD drive upgrade).
I would have liked to see a Core 2010, even an i3 in the low-end MBP. I know the reasons for not doing it (Ars had a great explanation: the three chips required for the Arrandales would have taken up too much space), but in this day and age, it seems more like an oversight than anything.
This is more of an isolated issue, but I've been experiencing some problems with the battery. One way or another, they will be fixed. But other than that, I've been quite pleased so far with the new MacBook Pro.