I like low IWB carry.
Just low enough so the bottom inch of grip is tucked behind my belt. That keeps the gun butt flat against me. Totally concealed under just my polo shirt.
I do this with both my Firestorm .380 (Bersa) and my Ruger SP101. Nothing ever shows with either. Nothing sticks out. After my Firestorm (Bersa) failed at the range after only 400 rounds, I no longer want to carry it. I now carry only my SP101 low IWB.
The Firestorm is thin enough to do this with a low carry Galco holster, but is thinner without a holster and only a ClipDraw.
A ClipDraw carry device eliminates the holster and it's thickness and bulk. See
http://www.clipdraw.com
Personally, I've found the Clipdraw thing to be fantastic for low IWB with stainless steel guns since they don't rust (well not much, not easily). The clipdraw for IWB may or may not be a good idea with a blued or painted steel gun (non stainless) because the gun might rust, as started happening with my Firestorm. This is why I now will only buy a stainless gun and use a ClipDraw.
When you carry IWB and get it low enough so that at least half an inch of gun butt is behind your belt, your gun will totally conceal with no butt sticking out at all. The gun is still fast enough to draw since only 1/2" or 1" is behind your belt. This is total concealment for small and medium frame revolvers with barrels up to 3", or
single stackautos with barrel 3.5" or shorter.
I like 3" midsize revolvers and 3.5" small and midsize single stack autos IN STAINLESS STEEL because then I can use a Clipdraw for low IWB carry and have total concealment, easy access to gun, and no rust worries.
If your gun is not stainless, I'm told there are coating that can protect it to some extent. Also, the black painted guns are more rust resistant than the blued guns. If a gun is blued, then you for sure have to worry about rust because IWB carry, especially without a holster (ClipDraw) means your private's sweat is likely to rust the gun.
The ClipDraw is positioned on the gun by you when you install it. You can position for high, low, or medium IWB carry. Position it to give you the type of IWB carry that you want. Lower IWB hides much better and only slows your draw a little. I prefer low IWB.
The ClipDraw eliminates the holster, which makes the gun a very important 1/4" narrower. It's awesome!!!