Now, it may seem unfair to rate this with five stars, but it's not so much the anthology itself, but the concept. I've read many better anthologies, but this is truly astounding in it's own right. Now, the first thing that you must remember, is that it's supposed to be patterned after the golden age of Astounding, in the late 30s & early 40s; right after John W. Campbell became the editor of Astounding. It's purposefully nostalgic.
Overall, it's a highly entertaining anthology, but the concept behind it is amazing. After Campbell's death in 1971, some of his friends/writers, got together to make this for him. Writing new additions, to old stories, some of which had not been used in years. Hell, George O. Smith used a story that was originally rejected by Campbell, because he found it years after, with a letter, in which Campbell praised it. The stories are definitely on the strangely fantastic side, but you have to think of the time period they're trying to emulate.
I gave this five stars, because it was a very fitting tribute to the Father of Modern SF & it stands as a testament to what he did. His influence will forever remain a piece of SF literature & literature in general. This may not be the greatest SF anthology, but it's worth the time to pick up & read.