I love necromunda, it was my all time favourite game.
I play GOMC-1 now
That do ya?
The game balance comes from the persecution anyone doing well recieves from other players. As soon as you get something good, it gets stolen from you. And one player doing really well doesn't turn into a campaign noone else can win, as anyone feeling they can't do well calls the judges.

Basically it's so unfair that everything balances out in the end!
ONe tip, you've got to be ruthless when you play, that makes for the best campaigns.
Other best bit: weapon rules, as long as a model has a rifle you can arm it with any rifle, the reasoning being, who's to say a laser rifle couldn't look like a flintlock an M16 or a stormtrooper blaster? Means you can use almost any model.
Just get it, it's cheap enough to give a go, you should be hooked. Most of the failings of necro are ironed out: more skills, more flexible gangs, take a wider range of equipment, excellent specialists etc...