Well, I usually run in Arcteryx Norvan SL and would probably buy a Solomon Pulsar or Nnormal Kjerag if not that. I tend to like lower-stack, ultralightweight trail running shoes. So not the shoe featured on the landing page. But Speedland does check some boxes and I can understand why someone would use them.

I was skeptical of Boa running shoes but got a pair from a different brand once and actually liked them. I think I still prefer traditional lacing but I liked them more than I thought.

There are trail shoes with carbon plates designed to add rebound like the Alphaflys. I have a pair of the North Face ones. They aren’t the most svelte “feel the trail” shoe, but they aren’t that gangly either. They are perfect for races with a lot of fire road, some pavement, and some trail. They get no love in the trail racing community as far as I can see, but I don’t know why. Hal Koerner helped design them and he’s a pretty good ultra runner.

I like the Saucony Endorphin Edge

My first few runs in the Norvan SL 2 they sliced my heels terribly.
I adjusted the lacing and every run after that has been amazing.
I've never done more than 20km in them though. Can't imagine a full ultra with them.

The SL 3 with the built in cuff are my next purchase.

I can see how the SL2 might do that to your heel. They fit feet great out of the box but I can see how if they weren't fit just so it might lead to some slicing.

I have the SL3s and have run in them now since they were released basically. I like the knit/mesh material around the opening although I had problems with the longer tab rubbing on my tendon. I cut the tab off and now it seems to work well for me. But it seems in general that section of the SL line affects different people differently.