I just have to chime in here and give just a little bit of my thoughts. I've been using Wordpress for 6 year now. And with all the theme developers I have come across, in both free and premium, StudioPress offers the BEST SUPPORT area. I have even purchased from RocketTheme's and I will NEVER, EVER, EVER buy another theme from them. Why? Because their support is absolutely lousey and once your plan has ended, they DELETE all of the dialogue you had when you were a member.
The documentation on here has been absolutely wonderful, and it get's even better over time. I especially enjoy the videos and the lady who does that voice over training is very calm and detailed. And when a member of SP isn't available, other users of the themes help each other. That is NOT the case on the other developer sites. Even on Theme Forest.. you cannot help another member with an issue. Only the developer can help.
So, in comparison to about 15 other top designers that I found on Wordpress.org's commercial page and have used their themes over time and needed help - StudioPress has them all beat. Period.
Okay, I am done now.