Solid Tech Speaker Stands

Has anyone tried the Radius Loudspeaker Stands from Solid Tech with their bookshelf speakers?

They look very cool and I was wondering how good they are?

Solid Tech:
my only issue is with the transparent cast acrylic used on the top plate. If you don't move your monitors around or on&off while making adjustments they should hold up. Clear plastic or any plastic used as a base material will scuff or possible crack much more quickly then say steel or another more durable material.