Just got an N810 yesterday, to sit alongside my 2 year old N800, as they are really cheap now, and I am really really impressed with it.

I know the hardware and OS are moreorless the same, but it feels a whole lot snappier than the 800. It also looks great and really cool and for the current price you cannot go far wrong.

I got mine, partly for the keyboard (spending more time on chat, facebook, etc these days), partly for the GPS as I want to look at doing some mapping for OSM, and having a play with ecoach when I am on the bike. Also the N800 struggles running Mauku, Carman, Canola, and Map, or maemomapper all at once!