Installing on iMac and downloading on MBP. Took 2.5 hrs on wired Ethernet and 30 min on WiFi. Different servers I guess and the wired one started just as the store opened.
When you get done with Lion there is a nice update to iTunes that make it 64 bit. I'm really liking the new Mail and iCal apps. Also love the Safari forward/back swipe. Memory management seems to be better too.
I suggest you pour through these reviews and make up your own mind. For me it is, as Mossberg says, the best operating system out there. However, there is a learning curve, so if that sounds daunting, stay with 10.6.8 as my wife is doing.
While it only took an extra 16 hours to download here in SBH. It was worth it. Just the scrolling alone is worth it I love what I have seen so far and I have just started using it..
Also proved the point that anyone with a tiny piece of broadband (narrowband) can upgrade. If you can find the DMG you could copy and give to the locals Macheads.