+1

I used them when I was courier hauling cargo to lash down bankers boxes of documents to my racks. That's 48 pounds of paper when full, and although they were never quite completely full I often had two on the rear rack and one on the front. Two bungees per box was enough to hold them securely through the hills of Seattle. I still use bungees when touring to secure my pillow, tent, and sleep pad across the deck created by my bucket panniers and rear rack. I also carry a couple of bungee nets and a couple more bungees for securing food/beer/firewood to the front deck on occasion while touring as well.

As much as I like bungee nets for some things, I don't feel that they are as secure as regular bungees. They are harder to get really tensioned down and even when they are pretty tight, don't seem to hold a load as well as two bungee cords. They are great for lightweight loads, or for reining in oddly shaped loads, and I feel are an essential tool to have as a supplement to regular bungees.

Just always get plastic hooked bungees and bungee nets. The wire hooks can really injure you if they pop free while you are trying to secure or remove them. I don't know what the benefit of the motorcycle specific nets are, are they bigger than the bicycle ones? Because a couple different companies make bicycle specific bungee nets with plastic hooks. If you do use wire hooks, make sure you've got some sort of eye protection on while manipulating them!

I will say that the effectiveness of bungees can be affected by the design of the rack. If there aren't a few different places to secure them it makes it real hard to get them tensioned properly. I've sought out racks that had places to secure both bungees and the leather straps I also use, but at times you still have to be creative in wrapping the bungee around some parts multiple times to use up some excess length and get it tensioned.