Nicely done, I have no idea what it has to do with user tests though. Could one not simply get the exact same functionality by having user send emails, and then viewing them in your inbox? Don't get it.
The other half of it is to organize the data automatically so that each user's personal story comes through. One way to do that is to get people to register for some blog like tumblr and post to that, but that's a lot of responsibility on your tester and will likely reduce their response rate.
We aim to fix this tradeoff. And we free up your time to actually act on the feedback and insights.
Also, we've got a bunch of ideas to make it richer beyond just emails--lean startup MVP...maybe we were too minimum here?
Think of it as if you wanted each user to use Posterous to send feedback, except their blog is already private, and they just reply to an email prompt from you to post to it.
Does that make more sense and seem valuable? How might you rephrase the last 2 benefits to make it more clear?