I've never owned a Summit but do own an API Grand Slam and the Equalizer. At first I thought I made a mistake buying the Equalizer because I wasn't happy with the seat and my API is very comfortable. But after installing the sling seat on the Equalizerit is very comfortable! And it's great being able to adjust the stand while in the tree! We've all been there climbing a treeand you get to a knot and you you're having difficulty because you put the stand on too tight. Well with the Equalizer you just give a couple cranks and open up the stand till your past the knot and then readjust. I don't work for Equalizer orown stock in Equalizer, just one hunter to another it's a great stand (with the sling seat!!).