What is the over all feeling, from you all who use this stuff everyday, of the Follow Focus and Rails from Cavision?

Follow Focus:
Basic Mini Single Wheel Follow Focus (http://www.cavision.com/followfocus/RFD15B.htm)

Rails/Rods:
Cavision Rods Support System for Mini-DV with Quick Release (http://www.cavision.com/rods/minidvQR.htm)