They have a fantastic selection of posters and prints. The best deal is probably for someone like me who like to do their own framing and mounting. The mailing is a bit expensive to the US and a bit slow--but then everyone has gotten used to Amazon Prime with next day delivery.
I really like the search functions on the site that allow you to search by dimensions, for example 24"x 1*", or by subject, or by artist, and was able to use this to discover a vast range of images by Homer Winslow that I never knew, peruse pre-World War II Art Nouveau travel posters for the French Riviera, and look at a myriad of advertising posters for art exhibitions. Good stuff.