Dynamic slings - Who's using them?

Is anyone using dynamic slings for trad climbing? 

If so what lengths are most useful, and for what tasks do you use them for?

Which ones do you like the best?

https://www.beal-planet.com/en/tapes/1475-9183-dynaloop.html

Do you mean this? 

That or similar, e.g. https://www.metoliusclimbing.com/dynamic-open-loop-slings.html

https://www.mytendon.com/en/mastercord-7-8-green-yellow/p-494/

I've been using Tendons version. 7.8 is less bulky than the Beal 8.1 (which I also have but don't use). I have the 120 for overlapping use for dynamic rap extension and anything else you want a 120 sling for (gear extension, anchors, foot loops, etc). It works great, but the reality is that it's much bulkier than any conventional nylon or dyneema sling. I keep using mine mostly because I like the circus colors. I never take it when weight matters. I've found the minimal amount of stretch offered doesn't equate to any discernible advantage considering the cons of it's bulk.

The rope is already dynamic so these are not going to add any significant value to that system. 

I guess as a PAS they are useful.

Devin Hanes wrote:

I think they work for doubled up gear, to equalize better.

Equalize better than what, a regular sling?

The point is the DYNAMIC part is not needed in a roped climb.

What kind of force are you expecting on your system?? Can you give a scenario where such a short section of dynamic cord is going to make any difference? I'm honestly baffled. The energy absorptive property of a dynamic rope is not just that it's stretchy, but that it distributes energy along many meters of the rope. 

Devin Hanes wrote:

Yep, being that it's dynamic I think it will equalize better under load.

This had been discussed at nauseum before,  you're better off clipping the pieces individually.  Equalization is a myth in most cases, nesting gear is a good example of that. 

Useful as a tether. And perhaps for that first piece off the belay, when you barely have any rope out but must climb 2x over that first piece? Just some thoughts...

I was of the understanding that the dynamic properties of the slings are not intended to save your innards from peak jolts, it's to keep the sling from breaking (like a dynema could) in a short jolting fall? Maybe I misconstrued?