I owned the same Alessi ankle rig but I found ankle carry did not work well for me. No matter how tight I cinched the velcro, the holster seemed to slide down to my shoe. I think ankle carry might work with high boots but not for shoes/sneakers.
I found this Comptac IWB works really well for me. It conceals well even under a T-Shirt. It's a very light rig and the pistol clicks right into the kydex. Big thumbs up for Comptac!
