We have 2 tandems, a Trek T900 with a single leg kickstand and a DaVinci Grand Junction with a double kickstand. I very much prefer the double kickstand. It is more stable. You can spin the rear tire to check for glass or other hazards, and lift the front and spin the front tire. You can remove the rear tire to change a flat since the rear tire is off the ground. If you have loaded cargo on the rear, it takes a bit of oomph to lift the rear to put the double kickstand down and to lift it up, but that is worth it for the benefits of the double kickstand.