I find that the novel is very fast paced and Pete Hautman certainly researched the subject rather well. The entire novel is narrated by Jimbo, a friend of Denn. Otherwise, the story is third person like when the story switches over to Cattie or Denn. The dialect in the novel is convincing, just as I'd expect of Las Vegas poker sharks. The vocabulary was spectacular, ranging from poker terminology to excellent synonyms for most generic words. The characters were intriguing and well written. The back stabbing Cattie was particularly interesting as when she was asked by Denn for her motivation for ruining him she simply replies that she enjoys destroying people around her. Jimbo himself is a strange one, as he is a friend of Denn yet he does not back Denn for the game at Artie's casino when asked for a loan.
Finally, I would say that this part of the novel seems significant to me. When Denn is in a really bad place, and at the bottom he considers killing himself by jumping off the Hoover Dam. After losing his earnings going towards the ten thousand dollar buy in later in the book in a game of black jack, he is finally broke. This excerpt from the book from right after he becomes fully broke, I find interesting in relation to that: "He got in his car and started it and looked at the gas gauge. He didn't even have enough gas to make it to the Hoover Dam." - (P.127). As suicide by jumping of the Hoover Dam was mentioned earlier in the novel, I found this rather funny. Denn does not even have enough gas to take himself to the dam and kill himself. This is significant because he ends up getting the money from Cattie, shortly after getting out of his car and walking to her apartment.
All-In is an excellent book, which might not be for everyone but is still interesting and a great read.