I use the Sterns tankbags from WalMart. They don't do too bad. They have velcro that you can stick on your tank, but I didn't want to do that, so what I did was I sewed on some strong magnets behind the soft side of the velcro and they stay on my tank just fine. Did a 200-mile round trip with them and I had no problems with them. I don't use them often, but they come in handy when needed.
You can see them in this picture I took last Spring before I started on my 200-mile trip:
And here they are again 80-miles into my trip:
Dan
You can see them in this picture I took last Spring before I started on my 200-mile trip:

And here they are again 80-miles into my trip:

Dan