Seems robustly built - but no less expensive that RRS or Gitzo. As opposed to some "old" thinking, there is nothing wrong with 4 section legs. I use 2 different carbon tripods with 4 section lens and even the 2.1 lb one with the 28mm dia top tube is considerably more stable than my old and gone 2 section, 14 lb aluminum Bogen 3051. There is not much to support that a properly designed 3 section leg is functionally more stable than a 4 section leg. At this level of quality and price, this is what you'd expect. Gitzo rates their tripod by the top tube thickness, as do other quality tripod manufacturers (ProMedia, Induro, RRS and others) and I have yet to see a Gitzo series 3, 4 or 5 stability rated by the number of sections in the leg. Their series 3 is conservatively rated to be stable with a 300mm lens, regardless of whether it has 3, 4 or 5 sections.

I second the thought on the cast vs machined apex - any flaw in the casting, like a tiny bubble in a critical area, would mean disaster, which is why I use Feisol, also machined from aluminum alloy. With those nice hefty looking hinge points between the apex and the legs - and the 10X carbon fiber, it sure does look like a very good tripod for up to a 400 or 500mm lens, or longer if you use an unlocked gimbal to track active subjects.

I've never seen one in person, but based on what I have read and your excellent assessment, I may start recommending it as an alternative to the other three pricey options. And their gimbal head options look to be of equal quality and stability as their legs.

I am sure you have a very good and stable tripod. I saw the price for their tripods and they are as high as those from Gitzo. We all know what a Gitzo tripod is.
When I was in the market for a carbon fiber tripod I went with a reasonably inexpensive brand called Desmond. The tripod has served me well, it is light and very steady and I paid $200 for it. It has a Cullman ballhead on it. I can use heavy gear with it with no sweat.
My tripod does not come with spikes like yours which is a superior tripod compared to mine. I can order spikes and have it on the legs in a blink of an eye if so I desire. I have not seen the need yet.
I noticed that the tripod is made here in the USA and that is great to me. Practically everything we buy today comes from China, not saying that their manufacture of tripods is not good. We get what we pay for.
Congratulations. I believe from what I have read in their website that you have a great tripod and it should be an important accessory for your photography.