I bought a CX4 Storm so I could work on rifle skills at an indoor range where the dedicated rifle side was usually closed for various range functions. With the availability of the rifle side being almost impossible to predict and the range, understandably, not permitting long guns chambered in rifle calibers on the pistol side, the CX4 made sense for me. (Before anyone asks- Yes, I had a 10/22 years ago, but I was never a big fan of it so I sold it.)
The CX4 was a decent little plinker. The gun's controls are almost completely ambi although you have to choose a configuration prior to shooting it. Another plus was that 9mm is relatively inexpensive to shoot when compared to defensive rifle calibers. Perhaps if I had a 92 and the magazine compatibility thing would have mattered to me. -If you're looking for something that is affordable and can be fun for a trip to the range, the CX4 can deliver.
That said, the CX4 carbine has limited application. I know some people have made mods to them to try to turn them into serious defensive firearms, but they're not unless you're one of the characters in Sci-Fi's new Battlestar Galactica series. For working on rifle skills, I found I was better served by using a real rifle that can be taken to a good outdoor range where I could engage targets at longer distances than indoor ranges generally provided.
I sold mine. I don't regret buying it, but I found there were better things for me to purchase with my money. Once you get past the "wow factor" I don't think the CX4 provides that much bang for the buck. While not completely pointless, rifles chambered in pistol calibers are limited in their usefulness.
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