Hard to put down!
The Author's description of the characters gave me a great feel of connection to them. It made me care for what would happen to them, just as with others of my favorite characters like "Stepping Razor" in William Gibson's Neuromancer or Hiro in Neal Stephenson's Snow Crash.
The Author uses some real-world science pieces to allows for the possibility of "jump space" (or jSpace) as a kind of "hyperspace with a twist" that opens an astonishing spread of possibilities which he uses to great effect. The Novel's cultural backdrop with a central power called "The Circle" is very much a realistic prediction of how our society today could evolve in the future. He clearly draws on the events occurring during the emergence of the internet and modern information technology which took place when the Author started developing this novel.
The descriptions and background details of the characters are rich, but built up slow enough to not overwhelm the reader with too much information and slowing down the story. By using this technique, the Author allowed me to grasp the basic character or location, then adding to it increments building the whole person or place into a complete picture. Once the story had build up its momentum and I'd begun to really care about the characters, it was very hard to put it down!