Has anyone tried using GCI's Bleacher Backer chair instead of the Sitbacker? There is a reasonable price difference between the two. The only major differences that I can tell is the split contour seat, and portage lock on the Sitbacker. I have webbed seats in my Souris, not buckets, so I wonder if there is any benefit to the contour seat? As for the portage lock feature, a simple strap or bungee could fix that.

Am I missing something that justifies nearly double the cost between the two?