Great fuckin game so far. Definately competes with the first installment on PS3. It even adds a few more layers of depth with customisation and classes over the original. There is a melee type class with a sheild that can be useful for assassinations.
Ive returned to my favorite tactic from the original though. Having an engineer accompany a tank and kill everything as I proceed through areas. If its an objective I have to claim then I may skip enemies and rush through with the tank and/or engineer. It works for both types of missions but some have to be approached differently when tanks arent allowed in certain areas.
This game seems to let you use the tank in every level, unlike the first, but it is restricted from entering some areas.
You will see me using this tactic to minimise movement points, often using a team of tank and engineer to beat missions. This works great because the engineer can both heal and replenish the tanks ammo, which allows for a more agressive approach.
The game hasnt challenged me yet but its steadily increasing in difficulty. It seems shorter than the first as well so I may go through it quickly. Having a blast though so far.