My personal experience w a number of sets of gator blades is that they do not perform as well as a high lift blade. I hear the new G6 gator is awesome although i have not tried it yet.
How well do the Gator blades hold up? They are made by the Oregon company, who also makes Fusion blades. I have read (in other threads here) the Fusion blades are heat treated high-carbon steel, and, therefore, tend to hold their edge fairly well.