The site is a very basic one page site, which you get for free. A nice touch is the ability to import guest list from a CSV / Excel file.
But you won't even be able to create image galleries for free, which seems a bit restrictive.
You need to pay a one time fee of $25 to get access to the good stuff:
For $70 you can add a custom domain
My verdict: cute, but there's better options on the list