I have a try at AIWB every six months or so. In fact I have an older JM CK G17 length holster w wing for my G19 squirreled away in my box o' holsters that I use for this. Unfortunately, for me at least, I've found that I can either carry AIWB, or I can carry a "spare tire." I can't do both. So since I currently have the spare tire, it doesn't work well for me, and I carry behind the hip in a JM CK IWB3.
I'm focusing on the spare tire, and have finally found a diet and exercise approach that is working for me. Once I get to target weight, I will try AIWB again. At age 61, I will probably not end up looking like @
Duke, but I may surprise myself.