Summary: If I'd written a review a month or two after buying an N800 I'd probably have given it 4 stars. However I now that the machine is notorious for hardware failures - the screen on mine went a few days after going out of guarantee. With so many other choices, I'd avoid the N800 and its close relations.
Summary: Don't touch this piece of junk! It won't turn on reliably. Do a Google search on "N800 won't turn on", to see all of the grief N800 users are having with this. It's a known problem with the N800, and Nokia won't do a thing about it. People are having to remove the batteries and even put it in a fridge to try to get it to work! I have two - one I bought for myself and one I bought for my wife as a gift. Both have this problem.