I have looked at it and they have some stunning photos.
Before you think of submitting photos to them, and indeed to anywhere, read the small print. As far as I can see you are giving them a lot of rights, they can freely publish and print your photos and have free use of them - forever. They have the option to use them in ways which will make money for them. Unless I am missing it, I see nothing about them paying you a penny for the use. If seeing your photos in print is reward enough then fine. Just a warning.
Many a child has been spoiled because you can't spank a Grandma!