It really is. Though I have more sympathy for the ailing Batarian than you do, Bubba.

You mentioned the sniper rifle - my second (first male) Mass Effect playthough had me as Infiltrator in this game. The Sniper Rifle is awesome. It's so much more usable thanks to the time dilation effect inherent to the Infiltrator. Seriously, it's so good. You get better sniper rifles as well as you go through the game, too.

As for Kasumi, easily one of the best team members in the game, both personality and gameplay. Shadow Strike is so powerful. It has a 2x damage multiplier against barriers, shield and armour, and incapacitates unprotected enemies (if they live). But what I really like is the fact that she tends to draw enemy fire away from you when she reappears, as enemies are distracted by her sudden presence.

When she's loyal, she becomes even better with Flashbang Grenade. It incapacitates any enemy within the impact radius, which gets pretty big. It also disables tech and biotics for a bit, too.

Coupled with the ever reliable Overload, Kasumi is killer. Her loyalty mission is really fun, but also rather tough, but you should just about be able to do it after getting the Doc.