Thanks for all the nice comments. Being retired helps when you've modeled your approach to finishing a house after Wharton Esherick
Yes, the hardware is quite easy to install. The track has to be installed when the wall is being framed. (probably obvious to anyone who has done framing).
The rollers (and track) are Stanley. There are four wheels on each truck - they ride on both sides of the track. These slide onto the end of the track, which requires that it be installed with enough gap to slide the truck on. There are two brackets that screw to the top of the door. The truck has a pin that snaps into the bracket. Thus, the installation procedure consists of sliding the trucks onto the track, spacing them to match the mounting brackets, and then lifting the door with a Wonder Bar until the trucks snap into the brackets. Helps to have another person around.
Stanley makes a heavy-duty set that has ball-bearing wheels instead of nylon. I would have preferred these, but that's not what I had, and they're expensive, too - about $50 a pair.