I carry mine in a Comp Tac "Flatside", albeit with a 1.5" belt. For the belt I'm using the Bigfoot Gunbelts 18 ounce with steel core. Easily supports the pistol, double mag carriers, and a rifle mag carrier all day comfortably without even a hint of sag. Used with only the pistol holstered and it is very comfortable. I usually carry OWB and the holster keeps the gut high and close to the body, additional mounting options were included for IWB, and with a can't away from the body for range use. There is also a way to adjust ride height.
I ran my set up in a Pat McNamara TAPS class a week or so ago and have few complaints, while not as a fast as a strait drop holster access was still acceptable, retention was good, and comfort was high.
As an aside I captured the coveted "Certificate of Victory" with the VP9 beating out all the mouth breathers who were shooting Glocks. Actually they were all really good guys, but I am compelled to flip them a ration of crap because man law.