Used to use the original Miami holster when I was in garrison in the Army and sold it, wish I never had. IWB holsters don't work well for me because I'm short and thin, with large chest. I like a SOB holster, but they don't offer much concealment. This shoulder holster is much more comfortable than IWB and offers good concealment. Set up is easy , in 5-7 minutes it fit like a glove. Bought this for my standard Springfield XD 4" 9mm pistol, and was happy to discover it works with my XDS 3.3" .45 as well.