I'm having fun with Thematic since a week. I actually have to admit, it did not really speed up my development time. I'm still not sure that it's a good solution for everything a designer would like to do. There are part of the original CSS that are doubled, and the typography is mixed and spread in more CSS files.
Apart this, that can be due by just my insufficient knowledge, I'm having a bit of hard time to shape the child theme in a way that my customer wants. No text, not post title in the home, category pages with thumbnails and description, post page with galleries, and more...
...so, I would like to ask you your opinions and experiences. I guess Thematic is a very stable and good framework. But I'm starting to be afraid that for what I do need, for my layouts, it's just to code myself my theme with all the freedom I need to be fast and sure of the control on the CSS.
What do you think? Are you really able to get out from a Thematic's child theme everything you would like? Even the oddest? :)
My best regard and wishing you a wonderful day!