DS-30 : Does what it says on the tin

Simple Pop 'n' Lock open/close design. Rugged design means it'll take a pretty good beating without breaking or falling.Mainly I've used it for micing bridges on cellos or floor stacked amps, live and studio.

Con 1: Even though it's pretty compact when folded out, its set design means it can be a bit of a nuisance if floor space is a premium (e.g. if you're micing a kit on a drum riser just big enough for the kit itself). Being able to adjust the angle of the arm would help with this.

Con 2 (nit picking): A bit more length on the extension would make it ideal. You can work around by attaching a boom but that begins to defeat the purpose of buying this product.

But ultimately, for the price it's a solid product and you can trust it with some expensive gear attached.