Just got it. My Velocity Systems Level IV SA swimmer cut plates fit really really tight in it, but they fit. I like it so much better than my Mayflower APC, which is why I'm selling it. The Shellback Banshee was really nice also, sold it though and kind of regret it. I plan on either getting another Banshee or JPC and getting another set of plates. Two is one, one is none.
How much better is the JPC than the APC? I ask, because I'm running the APC now and really like it.