I think the Summits are " Very Good" ...I use a Summit " Viper" climber......It' s light and quiet. It goes on the tree in the dark very well....The stand is rock solid.....I can stand any where on the platform (on the corners or any where) and feel no give. The grips are outstanding......I' ve not used one of their accesory bags but plan to this season. I' ve never used an API, and never plan to as long as I can keep my Summit......Factory service and concern for their customers can' t be beat.......