My buddy, currently living in Japan, bought a pair of them. I asked him to leave mine in the box until the day before I arrived, then plug it in and have it ready for me.
He forgot of course.
So, my plane gets diverted from Kansai to Narita due to a Typhoon, and it takes me an extra 12 hrs or so to make it to his place in Minami-Kusatsu. By this time it's 2am and I'm jetlagged all to hell and back again.
I plug my 860 in to charge, look at the screen on his, and collapse unconscious for 9 hrs or so. I wake up, my Z is fully charged and I am happy.
I've been inseperable from the bloody thing every since. It's replaced my Palm Pilot, My MP3 player, my little "haul everywhere" laptop, my Japanese study equipment (usually at least a Pocket PC), and acts as my book ready and emergency flashlight. I couldn't ask for more.
Yes, I'm still going to buy a SLC-3000.