Finish it; the action-story blend just might change your mind.
Your character, John Vattic, starts off pretty weak: melee attack, no weapons, and only one psychic ability. But it is from this ability that you start to get a sense of your character's potential for development, and the abilities that return, as the story progresses.
The controls are fairly well laid out and responsive. Most of the frustrations experienced while using them come from trying to figure out how to use, or to master, newly acquired weapons and abilities, in combination or in sequence, with existing ones in order to progress through different sections of the game.
You can choose the camera viewing angle you want to use: per-area overhead (fixed position) or from behind (free moving). Due to the design of the stealth aspects of the game, the free moving camera view seems to work best. There are some camera issues that affect the controls and controlling your character, but these are noticeable mostly only during a few specific sections of the game.
The design of most of the levels adds a certain feel of authenticity to the story-line. There is one unfortunate level design glitch in the PS2 version of the game, on the roof of the asylum in the Rescue mission, where you have to carefully cross a ledge in order to continue (if you are really stuck here, I can help; just ask). Other than that, the levels are well laid out for supporting the pace of events in the game.
If you haven't had the chance to play and finish the game, I won't spoil it for you. I will say that the action is always driven by the story. As you progress in the game, you can look back and realize how carefully paced the action and story parts actually have been, needed to be, in order for everything to make sense by the end.
Several comparisons have been made between Second Sight and Psi-Ops. Each game is well made in its own right. Action and story-wise, Psi-Ops offers more towards the beginning of the game while Second Sight offers more towards the end. Which one is better really depends on what you prefer to have in a game and when you prefer to have it.
If you are more of an action fan than a shooter fan, and you want a game with some strategy, a lot of variety in game-play, and a unique and rewarding story, then this is definitely one of the games that you have been looking for.