Even aside from its impact on Humphrey Bogart's career and on the noir genre, "High Sierra" is an entertaining and interesting movie that is worth seeing in its own right. Bogart's portrayal of Roy Earle, along with Ida Lupino, a talented supporting cast, and some well-chosen settings, are all fit together nicely to tell an interesting story.
Though it's hard now to experience Bogart's gangster roles as they would have appeared to their original audiences, it's still easy to see why this and similar roles attracted so much attention at the time. The character is interesting to begin with, and Bogart makes him even more so. The tension between Earle's ruthlessness and his sense of fairness, and between his desires and his practicality, makes for some interesting possibilities.
Bogart makes good use of these opportunities with his distinctive style. The other characters and the plot developments furnish plenty of material that develop Earle's character and give Bogart lots to work with. Even the sequences that might seem unlikely or out of place are used to add depth to the character and the story.
The climactic sequence in the mountains ties everything together nicely, in a very appropriate setting. "High Sierra" is the kind of movie that classic movie fans can enjoy both for the chance to see its influence on later movies and for its own interesting and well-crafted story.