So I read Goldeneye last night. For some reason it's been sitting there unread for years because I was more interested in his novels rather than the novelizations.
The book hits all the events of the movie and very little else. In fact, the whole thing reads just like the movie. It's the type of thing any author could have done, they didn't need "the Bond author" for any other reason than he was at the time. It also made no attempts to establish continuity with his timeline like he did with LTK. The climax and the last few chapters leading to it read very rushed, as if he cut half the page count. The deaths of the main villains are all written with no panache, no style. There's a point where one of the bad guys dies and I had to go back because it pretty much one sentence.
I'm a huge Gardner booster and I do not judge him based upon novelizations. Both LTK and GE were not up to his regular standards, but GE, it read like a summary of the movie more than a novel. I was really hoping for details on Trevelyan, as well as his friendship with Bond. Mabe even Bond reminicing about their old times. They are set up to have been great friends, but details of their friendship and their time together was missing.
One change I noticed was Zenia's murder of the navy officer to get the stealth helicopter. In the book he's an American Admiral, in the movie he's Canadian.