I have created about 10 Photobooks to date. I love this product.
I use the desktop designer software. I love that I can add my own backgrounds (colors and patterns), icons, frames, etc to make my books more relevant to my experiences. I do not know how the online version works, but I would assume similar capabilities.
The program is easy to use and the final products are beautiful. There are many options available as to size, format, paper selection, etc.
In addition, their customer service/phone support is excellent. And they have special offers/pricing all of the time. I always take advantage of those.
I highly recommend Photobook.