Are HID headlamp kits any good?

[jbach36]

I read up on some HID kits. I know there's a whole headlamp assembly I can get, but they're a lot more expensive. I can get a kit, with the anti-flicker kit (I hear the flicker causes a lot of problems), for $50 or so.

I've heard nothing but good things about the bulbs themselves, but what kind of problems will I have, if any, if I get a kit that even includes the anti-flicker?
I have enough problems in my life.....I don't want to buy more!

I can simply stick with the original type of bulbs for $10 each and be done if the kits are problems.

1991 W124 300d, 185k