I could put the packs on and take them off the bike in about 30 seconds and I had no problems with them interfering with my biking. I secured everything to the bike with one long bungee cord.
First photo shows how I used them for 600 kilometer trip around the island of Hainan, China.
Second photo shows the two bags hooked together.
Third photo shows the waist strap is wrapped around the bike rack spar and then cinched tight so that the bag will not move around or get caught in the spokes.
Video of my trip around Hainan: http://www.youtube.com/watch?v=Qin6_01vf0w