In the mundane world of mic clips and shockmounts the SP-20 is a gem! It stands out as a well-implemented, inexpensive solution for pencil condensers of all types. Smaller than a typical ring and band design, but still keeps a kung fu grip on your precious mic.
All I use
the mounts are all I use. nak shotguns to akg 451eb's. I also use it as a shock mount to my active set up. overtime they do stretch as I do not have a dedicated pair for each set so if running the smallest pair I do chose the tight ones. sure not for everyone but i have never had a issue with them or a recording. thats all I need
Nice alternative to larger spider shockmounts
The SP20 is a compact, affordable alternative to the larger, bulkier, and more expensive spider-type shockmounts. The SP20 also grips even smaller mics more tightly, when my spider mounts didn't grip them firmly enough. So if you need to fit a mic into a really tight space, or have a smaller-than-normal small diaphragm condenser, this may be just the thing you need.
It works, and it's stable
They work pretty well for isolating my SDC mics for my usual location recordings. Typically I have these located on-stage or in a space with minimal movement around them, though they've also been in use within percussion sections of large ensembles. Protects well against most bumps/thumps, and normal handling noise is dampened well enough.
They are not as isolating as rubber-band mounts. However, my mics do not slip at all in these mounts... whereas they can slide or pull slightly out of position in a rubber band mount if bumped.