Very fast & very enjoyable. Rage Software always did good action games, no matter shooter or car racing. Here we have another good example of their well done product.
Games has what every good shooter should. Well done 3D graphic, awasome soundtrack and F/X effects, dozens of enemies to defeat including big bosses (and first you have to find way how defeat them).
Ok, story perhaps wasn't worth much but in this kinda shooters it isn't too important. What is important that game first of all delivers huge amounts of pure fun. And this is why you should buy it!