In one way it helps and you can pick up more words here and there (especially while reading), but it does make it harder to speak. Being bought up with a Dutch family, I always use a guttural 'G', when I say German words, a big giveaway that I am not a German speaker.
Problem is now when I try to speak Dutch I have started to introduce the German way of saying things, which is probably not a good idea to do if you can help it
