I was using it yesterday myself and i was so frustrated overall with the not only my n900 but this SHITgic as well......

1 - the phone (while using sygic) was so hot that I think the extreme heat began to make the phone misfire and eventually lock up.
2 - I was in a real pinch having gotten lost and I needed the program to perform well under fire and OF COURSE it DID NOT (sygic are you reading this???????????) it took over 10 minutes for me to lock in on a satellite and then the keyboard stopped working.
3 - once i got the signal and plugged in the destination, sygic would randomly attempt to redirect me or tell me to make a u-turn (i believe this had something to do with the heat.... btw, ended up being forced to rig up the phone to my a/c to keep it cool)

this is UNACCEPTABLE and as much as i love my n900, it's nonsense like this that really makes me want to just get rid of this thing. i know lots of people with other devices who NEVER have issues with them. N E V E R !!!!!!!! they open apps that work, their phones dont burn them, they can simply rely on these devices. for a $500 device with a $65 map program in it, i am so disgusted with it all. thank you for reading. share your issues if yours are similar to mine.