I use an ankle rig on occasion but it's not my favorite. There are situations in which you think you'll need the gun but that situation resolves itself without the need for deadly force. Going to the ankle telegraphs your intentions.

I've used a few DeSantis rigs but I find that the Uncle Mike's ankle rig to be far more comfortable. Today's J frame rigs, the miniaturized 380s and 9mms such as the Kahr P9, are all ideal for ankle carry.