First touched it two months ago just to tinker with but didn't really do anything with it. Then after numerous frustrations with my current blogging setup, I spent the last 5 days hacking on it over the holidays and I think it's almost ready to launch. Had to do some custom stuff that I'll write about in a post. It's extremely hackable and I love it. The only thing that doesn't work for me is LSI for related posts. Even with a fast computer and gsl/rb-gsl it still takes 10+ hours with my 1,000+ posts. Anyways, having a super fast site is going to be a breath of fresh air. Google was saying 88% of sites loaded faster than mine ( http://paulstamatiou.com ), though likely due to the images in many of my reviews.
Also installed Google mod_pagespeed and all is well so far.
* Though to be fair most of that is just my redesign that is more minimal, less ads, etc, but there's something extremely attractive about simple, flat files. No worrying about if your database will get corrupted. Everything is in git..