This and the Spy Who Loved me were Roger Moore's top 2 of his own Bond films... and I can see that.
It's not as over-the-top as Moonraker (which is one of the worst Bond movies ever made), it's not as silly as some of his other outings, although, if you are a Moore fan that hasn't seen this yet, fear not, it still has the Silly Bond moments that are his trope.
It's actually just... solid. For Your Eyes Only is the Roger Moore film that could have been a solid, stand alone movie, removed from the 007 franchise, that still stood up on it's own.
It's a bit darker than the others, it's a bit more realistic, it's a bit more story driven... and yet it maintains the Moore Era silliness that people come to expect out of his films, but with an actual story feel to it.
The Spy Who Loved Me is Moore's magnum opus in the 007 franchise, but For Your Eyes Only comes pretty close to dethroning it.
Even as an unapologetic Connery Bond fan, this is one of the best in the franchise.