Using them on mic booms ATM, to hold my Lewitt LCT 140 Air microphones.
Pro: Perfect fit.
Integrated 3/8" holder, you just have to remove the ¼ inch to 3/8th that is already on the mount.
I'm a very happy. This unit is arguably better built, has a tighter grip, better rubber bands and holds smaller mics than what most SCM shock mounts on offer all over the web.
I do recommend for pencil condensers, I can't, however, comment for on-camera shotgun mic usage, as this is not my use case scenario.