I'm in the process of looking for a new holster. The first I tried was an alien gear and that was the worst ever, first was that the firearm didn't fit on the backing leather as in they did a piss poor job molding the kydex and just flat out failed. It was so bad that the safety was sliding off and disabling itself. I cut it up and threw it in the garbage, and utter piece of shat. I then went to a N8^2'ed holster which had all the retention in the world, though it had to much and I couldn't draw it when I needed to, usually ended up pulling the whole holster out with it. Which leaves me where I currently am with a Undertech undershirt which works quite well. I will say I'm looking into a slim IWB holster and the G2 by Urban Carry and the QCC by Jm4 have me interested.
Also I have the scorpion with a durakote finish and have about 2K rounds through it and the aluminium rails have yet to wear.