As you would expect from an anthology of this sort, there is a historical and/or critical if you like introduction to the field of science fiction, of some reasonable length, before getting to the stories.
Then, you have a chronological progression of tales, or various types chosen by the editor to be presumably representative. He appears to have done a rather good job, too, averaging 3.73 over a wide range of eras. Should be able to, though, if taking your pick. Pretty minor Wolfe and Le Guin stories, and a useless Disch tale drag it down a little.
With that, and the intro, probably a 4.75 anthology I think, definitely excellent.
Oxford Book of Science Fiction Stories : The Land Ironclads - H. G. Wells
Oxford Book of Science Fiction Stories : Finis - Frank L. Pollock
Oxford Book of Science Fiction Stories : As Easy as A.B.C. - Rudyard Kipling
Oxford Book of Science Fiction Stories : The Metal Man - Jack Williamson
Oxford Book of Science Fiction Stories : A Martian Odyssey - Stanley G. Weinbaum
Oxford Book of Science Fiction Stories : Night - John W. Campbell, Jr.
Oxford Book of Science Fiction Stories : Desertion - Clifford D. Simak
Oxford Book of Science Fiction Stories : The Piper's Son - Lewis Padgett
Oxford Book of Science Fiction Stories : The Monster - A. E. van Vogt
Oxford Book of Science Fiction Stories : Second Night of Summer - James H. Schmitz
Oxford Book of Science Fiction Stories : Second Dawn - Arthur C. Clarke
Oxford Book of Science Fiction Stories : Crucifixus Etiam - Walter M. Miller
Oxford Book of Science Fiction Stories : The Tunnel Under the World - Frederik Pohl
Oxford Book of Science Fiction Stories : Who Can Replace a Man? - Brian W. Aldiss
Oxford Book of Science Fiction Stories : Billenium - J. G. Ballard
Oxford Book of Science Fiction Stories : The Ballad of Lost C'Mell - Cordwainer Smith
Oxford Book of Science Fiction Stories : Semley's Necklace - Ursula K. Le Guin
Oxford Book of Science Fiction Stories : How Beautiful with Banners - James Blish
Oxford Book of Science Fiction Stories : A Criminal Act - Harry Harrison
Oxford Book of Science Fiction Stories : Problems of Creativeness - Thomas M. Disch
Oxford Book of Science Fiction Stories : How the Whip Came Back - Gene Wolfe
Oxford Book of Science Fiction Stories : Cloak of Anarchy - Larry Niven
Oxford Book of Science Fiction Stories : A Thing of Beauty - Norman Spinrad
Oxford Book of Science Fiction Stories : The Screwfly Solution - Raccoona Sheldon
Oxford Book of Science Fiction Stories : The Way of Cross and Dragon - George R. R. Martin
Oxford Book of Science Fiction Stories : Swarm - Bruce Sterling
Oxford Book of Science Fiction Stories : Burning Chrome - William Gibson
Oxford Book of Science Fiction Stories : Silicon Muse - Hilbert Schenck
Oxford Book of Science Fiction Stories : Karl and the Ogre - Paul J. McAuley
Oxford Book of Science Fiction Stories : Piecework - David Brin
Give tanks a try.
3.5 out of 5
Flame on, lights out.
4 out of 5
Air travel advancing control.
4 out of 5
Amazing scientifiction.
3 out of 5
Interplanetary interpersonal communication.
4 out of 5
Showing your flight age.
3.5 out of 5
Altered man mission adds a mutt.
4.5 out of 5
Dead race destruction discovery toasting.
3 out of 5
Grandma has a pony. All the better to help her defeat alien invastions.
4 out of 5
Composite Mind War accomodation.
3.5 out of 5
Martian labor aeration.
4 out of 5
Brain capacity reduction circuit.
3 out of 5
Human lack machine chaos conflict.
4 out of 5
Population space premium.
4 out of 5
Underpeople Lord assisted capital punishment escapage.
4.5 out of 5
Dowry delay death.
3 out of 5
Bubble suit Titan tearaway.
4 out of 5
Breeding punishment volunteer.
4 out of 5
Classification.
2.5 out of 5
Slave vote.
3.5 out of 5
Free Park experiment not bright.
4 out of 5
Got a bridge to sell you.
4 out of 5
S8x and violence.
4 out of 5
Betrayer Star Knights.
3.5 out of 5
Interspecies business shocks.
4 out of 5
Cracking victim charity.
4 out of 5
Total access story program plan.
4 out of 5
A whole generation of children with enhanced intelligence wipe out all the adults via bacteria, and these superbright changelings go hunting the remnants that haven't been killed outright.
3.5 out of 5
Dropping your bundle and bundle.
4 out of 5