What is everyone liking these days for IWB holsters?
I only have experience with an Aliengear IWB 3.0. It seems to be pretty good overall, but one annoyance is that the allen screws keep loosening up and I haven't yet gotten motivated enough to apply a little loctite to them. Has good retention and can adjust it to sit pretty deep or pretty high on the waistline, depending on preference. I bought this one mainly for a Walther PPS gen 1, so the kydex is molded specific to that handgun. One other annoyance is that it's not really a grab and go kind of holster. It takes some effort to put it on and get set.
Just bought a new Shield 9 because of the rebate and low price. The shield slides into place nicely and retains well. With the aliengear, you can adjust the tension. It has a little bit of extra room as the Walther is just a touch bigger, but the fit is pretty good really and it doesn't move around. Trigger well is fully covered, so that's good. I think I'd be perfectly ok carrying the Shield using the existing holster.
That said, I may try a different model IWB holster, thinking maybe something a little more grab and go that you can just slide into place easily over the belt while your pants are fully in place. Was looking at the CYA supply IWB molded for the shield. Any experiences with this one or recommendations for others?