I have been thinking about getting an IWB for a while. While I have seen many a great review on the various IWB holsters owned by folks here on TGO, I am a see it, feel it kind of guy when it comes to most things so I just left Arms Fair with a Desantis Intruder for my Gov't 1911 and I have to say I already like it quite a bit. It is a tuckable IWB that is very comfortable and has good retention without being overly tight. I actually did a handstand and walked a few steps upside down to see if it would fall out (no movement of gun) but it has a very fast and smooth draw.
It gets a conditional I will post further thoughts on it as it gets good and broken in and once I have a chance to get used to its all day wear feel.
Can't find a pic of the 1911 version so here is a pic w/ a glock from the midway site.