I've had my N9 for about a year now, replacing a N900 (miss the keyboard). While I still keep it since there is nothing out there that even approaches the overall experience, even without the hardware keyboard, my particular unit is starting to become hard to use.
I had some random reboots from day 1 and they got a bit better after the successive updates (e.g. Drive is no longer rebooting the phone all the time), but I still have some reboots usually when I try to start a call or when I try to answer a call. At the moment I press the button there is a reboot. Very annoying. Oh, and once it was when the alarm started.
What's more, for the last few months, I've had the messages app show "no messages", unless I wait for over 20 secs and then my SMSs start to appear. This started a little before the last OS update and the update did not fix it. More recently, I have started to experience slowness in recognizing a phone number that is in my contacts list. Most of the time, even if I let it ring for a while, the phone number is not translated to a name from my Contacts. if I wait more (usually after I have answered) at some point it finally resolves and shows the name instead.
I could stand the reboots, with my usage (not too many calls) they would occur once or twice a week, and since I am in Greece where the N9 never officially came (mine is from Denmark, 64GB black), I am not sure how easy (or slow) it would be to have it serviced so I just waited hoping it was a matter of another update.
But the other issues have made my wonderful phone hard to use. I am attaching a log that ends after my most recent reboot in case someone can help out. I can't see something significant at the moment of the reboot, although there are a lot of Fenix debug messages and also some troubling i2c_write: Remote I/O error.
So, anyone very familiar with the N9 can spare a few minutes to take a look? Thanks!

PS. Last time I opened a N9 syslog it was just 1kb, I wonder how I got such a big one now.