I'm a little late to this convo and this is my fisrt post to this forum. So HI!
first of all I love my Nikon products, so that is why I went out to buy the 1J 4 days ago after my wife dropped my Epl1 in Cadiz last weekend. I gotta say that this cam is a total miss. It is not very user friendly at all.
Pro (IMO)
-upto 60 FPS (only in good-excelent light)
-Slomo video (again in good light only)
-GREAT HD video quality (even in low light

)
-very compact, easy to travel with
-great Hi Res screen
Cons (IMO)
-Slomo is kinda goofy because it is captured in a UBER widescreen format that is annoying to compose with
-overall image quality is lacking (Im a total noob to photography and I am NOT satisfied, a more sophisticated Photog would be upset)
-settings tucked away in menu (total lack of control, cant react to changing conditions easily)
-average (at best) low light performance
-I feel like I'm going to break the flash every time I use it
-new RAW format is a PAIN IN THE ASS to work with. (giving LR 3.6 fits)
-jpeg is horrible
I have just ordered the Sony Nex 5n and should be recieving it soon. I should have just ordered it to begin with and save myself the grief, but brand loyalty got in the way. I will post some pix soon.