I like the simplicity of it all and the concept is cool, but I think the price is outrageous. 25$ for a single page with text and pictures? I could just get a free flicker account and create an album for my pet. I know "unlimited" is kind of nice, but I don't think people would upload that much pictures of a pet, probably no one would take the time to upload more than a hundred pictures. Remember that there is a finite number of pictures of your pet, if you only had taken 30 pics of your dog and he's dead, you can't really add more pics later on.
Also, I think the choice of picture on the plans & pricing page is not right. It's showing cute puppies but your website is about pet memoirs and I think it would make more sense to have an adult animal and maybe even give the picture an old look. The current picture does not appeal to the memoir side of the website.
Other than these things, I think it's well done and looks good.