Fun once you get used to the controls.
The control is the same as every other game that uses the Turok 2 engine (read: Turok Rage Wars), meaning you use the C buttons for movement and the Control Stick for aiming. I hadn't played the others before, so it took some time to get used to. It actually works to your advantage after a while.
I only have two major complaints about this game:
1. Many indoor environments are so dark you can't see what's happening, although you can use the muzzle flash from your gun to see, which is kind of cool. I can't say from experience whether or not this is better with the Expansion Pak.
2. There's no battery-backed save feature. You can either use a Controller Pak, or write down passwords you get at the end of each level.
Overall, if you see it for a decent price, pick it up.