ReservoirAngel said:
If you manage a one-hit kill with it on mechs it's quite satisfying seeing their head explode into sparks and spare parts.
I watched my brother playing through a gameplay section as an Infiltrator once and, at least from my view at the time, the cloak seemed kind of pointless since as soon as he uncloaked every enemy automatically knew where he was hiding again.
My second playthrough of the games was as an Infiltrator, and I loved it.
I wouldn't say the cloak is pointless, because I've seen videos of people using it very cleverly; but I will say I almost never used it (even though it would have saved my ass more than once if I did). So you don't need to use it if you don't want to.
The Vanguard is still my favourite class; I love the combination of bionics and a shotgun. But if you're looking for a more cautious style of play, after going with an Adept the first time, then the Infiltrator is the way to go.
Plus, it would mean you've tasted a little bit of everything the game has to offer! (Combat, Bionics, Tech)