Ankle holster are good for a backup. I recommend against it. First, you need to bend down to get the gun. How long does that take? Then you need to look down and fumble with the holster, which means you take your eyes off the target. Then you have to raise the gun towards the target. You would not have a chance. Even someone with a knife would get to you way before you have the gun on target. I still think the hip IWB or OWB. Fastest way to get gun on target.