Great game, I enjoyed it from start to finish. Well worth the price.
Gamespot gives it a rating of 8.6.
"Resistance successfully combines many of the best qualities from other great first-person shooters with spectacular visuals and a few novel twists."
I think it's a great game and better than Resistance 2, mostly due to the atmosphere and blending the familiar British setting with the mysterious alien things. Resistance 2 has less mystery and atmosphere.
For all those decide to purchase then you may like to know:
1) The DLC which previously cost a few quid is now free.
2) A patch is available which provides rumble/force feedback (ie dualshock support). To install this you must select the online part of the game, obviously the producers considered the game to be perfect so only checks for patches whilst playing online.