DSL Tools Storytellers
Pedro points out a https://blogs.msdn.com/federaldev/archive/category/11117.aspx by David on the US Federal team.
Edward Bakker also has a new installment in his long-running series about working with the DSL Tools on a project with Christian Weyer.
It's really gratifying to see people getting our vision and the level of utility being achieved even with our tools still at a CTP stage.
Edit:
Of course I also forgot Xenopz who, I think its fair to say, has had more mixed experiences with our tools.