I don’t think you can get much safer, reliable or intuitive than a Zigzag. It just doesn’t require that much thought to make it work. And with all the fear of them bending or breaking how many times have we seen that be an issue?
I have three different versions of the ZigZag, and like 6 in total I think. Never had a single problem with any of them. It's been my go-to for DRT for like a decade now, and along with a chicane, an on-again-off-again SRT device. As mentioned in an earlier post, it just works. It's the Honda Civic of climbing devices both DRT and SRT.