The Byrds I've seen tend to be a bit heavy, but they exhibit all the fine quality Spyderco is famous for. In an era of super-light weight knives such as the Benchmade models, they may be more than what a lot of folks want to carry; however, they will cut very well and last a very long time.
When using a light knife for heavy duty, I never quite know how they'll hold up; however, with the Byrd, I don't think that will be an issue.