Scott Long , Aug 28, 1999; 10:06 a.m.
A few points to add to Joseph's comments. 1) It is compact, about 4"x9"x.5", which makes it easy to put in the camera bag for hikes. 2) I put a QR plate on the bottom of the rail and attach it to a 3-way pan head. And, I found the Bogen 3229 head (a simple QR head that swivels in one direction, designed for use on a monopod) works great attached on top of the rail. This head is about 1.5" thick and moves the camera above the rail so you don't bang your chin into the focusing rail.
For the money, it is a very nice rail. I went to six cameras stores before I found it. All of them carried Bogen, none of them knew about the rail, and when I found it on a shelf at one store the clerk was surprised they had it.