This looks like a very nice service and looks to be well designed - I'm not a designer myself, but if I was, I would probably use this.
I do have one comment: the spinning background on the homepage is giving me this weird vertigo effect that makes it really difficult to read any of the text on the page. Perhaps instead of animating the background you could make it static or perhaps make it static but with random placement (something like what Simple[1] does on its homepage background).
Interestingly enough, there are responses from both sides, and I won't get into it in detail here, but it is quite a read…