If the C2 is anything like the P DUO you will be fine. I have been personally using the P DUO for a while for uniform carry. The only change I made was going to the 509T as I wanted an enclosed emitter since I am in the pacific NW and it rains a lot. Since I recently retired, I decided that I would get a second Staccato and decided to go with the C2 duo. I filled out my paper work the other day but am waiting for it to clear. The gun felt way better than the P in my hand. I plan on putting about 1k through it along with 50 Speer G2's once it gets out of jail.
From what I can see most of the people posting are going off of STI's previous guns. Also, do the Heroes program, only took about 2 weeks for them to ship the gun.