This kind of developers are the GUYS which inspiring Open Source and he represent the hummanity we need. Really I'm very happy and thankful with Tuan ... You are a COOL guy, sincerelly ;D.
God bless you hugely
I add it as one splash popup to encourage the respond to one survey and the numbers of people who respond it raised.
My only recommendation is you can give the chance to link the popup to one item or to other module.
Congratulations to the devolper. I thank this kind of extensions when are free !!