I really like reading groovehq's blog. The writings are very specific with lot of actual details. This one is no exception and great piece of writing. The actual customer email screenshots are a gem. Just one suggestion: To get rid of the pop up that comes up first time when you visit the page, you have to click the cutesy "No Thanks I don't want to grow my business". This even though is trying to be different does not look professional enough to me. I would just re-word it to "No Thanks, take me back to the page where I was".

EDIT: Found one typo in the blog where it says "4) How Much are You Willing to Get Dilluted?". Should be Diluted right ?

EDIT 2: Typo has been fixed.