Pros:
The cranks do look good (decent decals, nothing like Elilee).
They’re of good quality.
Weight has been spot-on.
They come well packed in a cardboard box.
Cons:
No instructions.
My 4x110 spider is not true - wobbling Dura-Ace (straight with Dura-Ace cranks) chainrings ain‘t pretty.
Support never answered any of my mails.
Took about 7-8 weeks to get delivered. Shipping was lightning-fast though.
Actually, I am running them with a Sigeyi Spider PM for Easton. This way the wobbling chain rings are nearly cured.
The installation instructions for all these cranks are basically the same from what i can see.
I just received a set of DFS Carbon cranks yesterday, and they look great—24mm titanium axle, 320g for 165mm. Everything seems good, but again, no installation instructions.
I reached out to the company, and they replied saying there are no special requirements, just use standard installation tools. Since there was no manual, I pushed a bit further, and after checking with their "tech team", they sent me some photos. The instructions they provided were basically the same as Cybrei's. I called them out on this, as I had already sent them the link for these

I pointed out that it’s not acceptable to ship a product without proper instructions, especially since I can't install it without them. I’ll be installing these on a BSA bottom bracket, and according to the Cybrei chart, if the bottom bracket shell measures 90.5mm (as specified), I need to add a 0.5mm spacer to the drive side. If it measures wider than 91.3mm, no spacers are needed, but it can’t exceed 91.6mm. So, if there's any paint overspray on the BB, I’ll likely need to get the shell faced, oh and get some vernier callipers as well.
No instructions are definitely a downside, but my Cybrei crankset cost $500 USD, and this DFS set was only $250 USD, so it's not much of a surprise.