Extendable slings is a win-win for me.
I love the extendable slings on these! At first I didn't think they were that great, because I racked all the hexes on one biner. Then I climbed Baboquivari Peak with them (several pitches of 5.6). I took only passive gear on the climb, and so I re-racked these to be each on their own biner, using BD neutrinos for color coding. Returning to my usual mix of cams and passive gear, I haven't "demoted" them back to a single biner yet. I use them way more when they're on their own, I can get right to the one I want, and usually I don't need to extend them beyond the sling. Fantastic.
At first I also didn't like the lack of intermediate sizes, but I kind of like how they match BD cam colors now. Makes it real easy to see which one I want from looking at the rock.