I like the look of it!
It took me some time to find and change the background image (but I'm new to C5). Then I wasn't able at all to change the placement of blocks. The documentation doesn't help and my support question is unanswered after a week.
Too bad, guess I'll make my own theme.

In all fairness they state technical issues leading to unanswered mail, which may very well be true.

I 've revised my rating accordingly, although I won't be using FlexCrete:Masonry since I've now made my own theme.

This is really good theme, it is easy to modify and well commented, I specially like the fact that since the release of ver 1.0 we got right now a ver 1.1 with improvements proposed by users in the forum.

so for my first impression I will gladly buy other themes/addon from growcurve :D