I tried it on the fields today, it was the exact same as a Tippmann in shooting, but it looks cooler
I'd only get it if you want a gun that already looks like an M4A1, otherwise, you can find customization packs for other guns that make it look the exact same.
If you REALLY want a pre-configured M4A1, I'd go with the RAP4 paintball series. They're absolutely amazing, the paintballs go in a magazine, and the C02 tank goes in the stock. The only problem is the price.
For information on Tippmanns and how they shoot, refer to my signature.