Kangroo Carry had a display at the TCHA annual meeting last weekend and I have been curious about their products so wife and tried on a sample. Wow - we bought three different models. I've been wearing my M&P 9 compact the entire week, day and evening, in the Standard II model. It took about a full day to get used to the rig, at first I thought there is no way I'm going to like this, but sure enough after a day or two, I rarely know it's there.
When I was carrying IWB/OWB at 3:30 I had to keep my shirt from blowing open and had to be careful when pulling my iPhone out of its case (same side as the holster) so I didn't expose the carry. And as all of you know, there are certain issues when taking that pottie break. I usually pulled the gun out of the holster to make the process a little easier.
Also when driving with IWB/OWB at 3:30 position, there was a little discomfort, not that bad, but I thought how difficult it would be to draw from that position with a fastened seat belt. One other aspect I just thought of is after carrying on my hip for several hours, I would get a little tired I suppose in the hip area - it was noticeable after several hours of carry. No such issues with the Kangaroo.
To my complete surprise, dear wife will now carry the Ruger SR40 in the Air Marshall holster

One thing I don't like is trying to carry a spare double stack magazine in the belt part - it pokes me and it really isn't that comfortable, so the spare mag goes in the pants pocket. The single stack Sig magazine does work great in the Kangaroo mag pouch.
YMMV, but the Kangaroo is now my primary carry holster of choice. The other various holsters we have (IWB/OWB/Remora) will still be used sometimes, so they will remain in the duty-ready position.
FYI: My body size is average - not tall, not short, not fat, not thin. Wife has the typical female short torso.