The last time I did that was in 1978 on a Rabbit - with no experience whatever. It was a piece of cake and they worked fine. I did the timing belt, too.
I sure as heck wouldn't try it on my 1999 Golf. I can't even change the headlight bulb.
It's not that hard, just a little awkward because you can't really see how it screws in while you're doing it because the light assembly is sealed except for the bulb hole.
