I've carried my M&P Compact in a Remora since around April of 2011. I purchased the holster just to try it out and see if it worked as advertised. I figured it might be a nice holster to throw on to run to the corner store, etc.
Over the past two years the Remora has become the only off-duty holster I will use! I have tried to go back to other brands (Galco Triton, Crossbreed, etc.) because I'm a gear freak and have a hard time sticking to one platform... but I can't get away from the convenience and adjustability of the Remora. I'm 5'11", 190lbs and have no problems with shifting or falling out. The M&P9C holster is the reinforced ART model. I also have a Remora for my Beretta 950BS, S&W 342PD, and just put another into service with my "new to me" CS9. I definitely think the ART is mandatory, and for daily carry I like the reinforced top. For the best concealment the standard (non-reinforced) model works a bit better.
As for muzzle-safety when holstering...With the reinforced top I can holster as easily as with any other IWB holster. Another method I use, especially in an administrative capacity since I carry AIWB, is to remove the holster with my support hand holding over the front of the holster (essentially over the top of the slide if the gun were sitting in the holster), bring the firearm up opposite my hand and place the gun into the holster...I never muzzle my hand. I can then replace the holster/gun in my waistband with no danger of something coming into contact with the trigger.
Lastly...I have noticed that with any new Remora, it takes a few days of carry before the material "wears in" and becomes really comfortable. I forgot about that part when I started carrying the CS9 and it felt bulky and uncomfortable. A few days of carry and it's good to go.
I tried the Sticky Holster for my S&W 915 and while it seems more sticky than the Remora, I didn't like the build quality, options or fit as much as the Remora models. I actually used the version for a shorter barrel to allow a good grip in the holster. It works well for its purpose but if I had to pay for one or the other my vote goes for Remora.
Another pic...I sold the LC9 and its holster because it's not approved for carry by my department, but what a great combo!