Go on the "Original CZ Forum" and search the threads. There's a bunch of competitive shooters on there who use various CZ Shadows, and run a ton of rounds through them. There is literally years worth of info over there. There's also several good Youtube video reviews on the Shadow line too.
They are definitely nice shooting guns. There's a 75 Shadow Custom sitting at my LGS right now, but it's too pricey for my blood right now!