I've been traveling for over a month now with my new empire builder and love the bag. Its probably the best laptop / travel / professional bag I've ever owner (not surprised considering I'm a walking Tom Bihn ad). My only issue is that my bag is very heavy and tends to start bouncing as I walk with the ultimate shoulder strap. Does the Terragrip or simple strap fit the EB, and are they up to the abuse and weight of a loaded EB? Thanks in advance guys.