Well, I have a couple of them in front of me and just don't like the flimsy feel of the ground terminal. Neutrik and Furutech (even though I'm not a fan of their 1/4" all that much) have solid pieces of brass for the ground connection. The Yarbo has a similar ground to the SwitchCraft. As you can see from
this photo, the ground is fairly thin and bends easily; then again, so do the thin and quite large solder terminals for left and right channels. It just has this feel of a lesser quality connector than it really is. I do like the connector for it's "audiophile" philosophy and design - it's top notch in terms of materials - probably the only 1/4" I've seen that uses Teflon and copper, but copper is soft and that means it feels a lot less "solid" than brass alternatives.
I've grown quite fond of the Neutrik "compression" type of strain relief, so this clamp doesn't "feel" as nice. Purely my opinion, personal preference really.