i got my kit today. and after a quick run i think it has more cons than pros. (don't know if anyone cares about my opinion) i was really looking forward to it (a bigger part of the reason i got interested in N800 in the first place), but the software is very average. I have to admit that I'm only comparing to a Garmin Nuvi 350 ($400) which i used a few times and that unit blew my mind away.
i think the only Pros Navicore has is the POI that are placed right on the map (Cons: even those are only usable at low speed or while stopped otherwise they just show up as dots), everything else is very mediocre.

it looks like the software is designed more for an urban pedestrian than a highway driver.

some things i don't like or haven't figured out yet:
- the fact that street names are only shown once stopped is not very convenient. if you go over 25-30 mph the names of the side streets disappear. (it'd be nice to have a "street detail" option to show the names of streets all the time)
- you can't really tell which streets your route will take ( when you zoom out its just a trace on the map without clear indications which roads or highways)
- can't look at turn-by-turn directions ahead of time. edit: you can kind of go turn by turn when click the hardware buttons, but it'd be nice to just see it in the list fashion...
- when i punched in my next destination from a parking lot of a grocery store, it told me to drive to the nearest road, before it showed any directions
- you can't set avoidances (toll roads, u-turns, etc) edit: found the ferry and toll roads in the settings, but still no other avoidances to check on/off like u-turns or highways...
- no text to speech for street names.
- max speed/ total distance/ traveling time / stopped time/ average speed: seems to lack simple things like that.
- the screen real-estate is not used well in my opinion.

in general not too many options/settings one can tweak... i kind of hope there will be updates...

i haven't driven around with Maemo Mapper yet, but now i'm looking forward to it.
how did you work that out? i can only get to work with either or.


edit.

some additional thoughts.

i spent another day-two driving around with it and couldn't get more angry at Navicore. i imagine a lot of users will be disapointed.
i considered returning the unit, but decided to eat the cost of it (and maybe retaining the right to complain about it )
some reasons to keep:
- generally i don't like the hassle of returning things, especially to online stores.
- maybe Navicore will come out with an update and apologies.
- there is an opportunity to kinda make your own skins for it and sounds (don't know why you'd want but just for kicks, change colors and use your moms voice).
- i think you can slightly improve the screen real estate by making the skin transparent (edit the png files in the image folder), but it probably wont help much, maybe just make it look a bit unique, i will try that over the weekend...

more on the software itself.. in 3D mode street names don't show up at any zoom and you cant really zoom out much anyways. (need to 'manually' switch to 2D mode)

because of that, this kind of screen is practically useless. Think of the scenario: unknown neighborhood and you just want to know the major intersection that's coming up.... in fact you can't even tell a major street from a minor side street!



in fact that is my preferred scenario for a nav software. especially in the "home town area", generally i know my way around, and don't want to spend too much time looking up or punching in addresses, i know the general idea where to go, just want to make sure i know where i am if the hood is foreign... plus usually when people give you directions to whatever location, they give you a few streets as a guide, ie this or that intersection and make a right once you pass so and so street... i can't imagine people punching in addresses every time they get into the car.

also if you have touch screen issues, like some of us, poking at the tab on the right (where you punch in the route info) can be a challenge.

also there is some issues with pointing North... (magnetic north vs geographic north? ) maybe its only my region problem, here are the screen shots compared to MM:






and just for fun: