I just picked up one of their new Idasen desks. It's a lot sturdier than their previous ones that I've seen.
I get minimal wobbling of the desk surface at full height, but my monitors do still wobble a bit. At normal desk height there's no wobble. I think most of the wobble comes from the cheaper VESA mount, if I'd gotten a more rigid one it would be better but I wanted more flexibility in arranging the monitors.
I held off on the standing desk for a long time. When I saw the IKea Idasen, I knew they had solved the wobble problem. The desk is awesome and more people should consider it. I also specifically broke out the part numbers and only bought the base. I put a Bamboo top on it.
My monitor does also wobble a bit with the cheap vesa mount I have (it's also a ultra-wide). I'm still researching a proper arm to mount.
Can confirm the sturdiness of Idasen. I used to be convinced that IKEA particle/paper-filled boards can never be as good as solid wood, but apparently the new leg/underframe combo worked wonders to prop up the whole thing, and it now serves as the base of my main EE workbench.
I get minimal wobbling of the desk surface at full height, but my monitors do still wobble a bit. At normal desk height there's no wobble. I think most of the wobble comes from the cheaper VESA mount, if I'd gotten a more rigid one it would be better but I wanted more flexibility in arranging the monitors.