I bought the Switchblade Edge last year. I see they've upgraded it by adding the expandable foam. I did this to mine last year and it made a big difference. I love the collapsible frame, it packs up great and is silent in and out of the woods. I think the Blade SD and the Dagger SD are going to be great stands. I think I'm going to add a Dagger SD this year. This will make 4 Summit Climbers for me. They are by far the most comfortable climbers on the market.