Don't like the CS1 at all.
Just feels "wrong" in my hands, just too chunky.
Went with the Dye M2, which dosn't squeak, and can't fault it at all. The only down side is the price.
You really do need to play a game with as many guns as you can before buying.
If your near Manc (or meet up at a field) your more than welcome to try my M2 (or LV1) for a game.