Re. comparisons - I've boxed up the Pentax K-5 IIs so only the Q can take photos, making it difficult to compare the NX300 to another camera. On the other hand it's smaller than my 5"-screen cell phone in two of three dimensions, so that's saying something. The Q is definitely smaller in every way, but given its 1/2.5" sensor the comparison (0.4" against a 1.15" using that math) gets a bit silly. Silly data is still data though, so there it is.
Well OK, it's pretty bad but the phone in fact can take an image of the two cameras together. I warned you!