I received this collection today as promised, having ordered it when the first announcement was made some months ago. I have not read the novels again but wish to comment on the presentation. The books are produced to the same standard as other LoA books, with clean typography, high-quality paper and Brillianta cloth binding. The end notes explain the sources of the texts (for example the multiple versions of Alfred Bester's The Stars my Destination, originally published as Tiger, Tiger) and define many names and places that might be unfamiliar. There also is a web site with essays on the novels and other information (loa.org/sciencefiction).
In my opinion the nine novels are all among the best science fiction novels of the 1950s. There are some favorite authors missing, including Kurt Vonnegut, who has his own set of Library of America volumes, and Ray Bradbury, who may someday also have his own volume. But the selections are excellent and the presentation fine.
Plus, to buy the least expensive mass market paperbacks of the nine would cost significantly more than the price of these volumes.