Does anyone here like Tangerine Dream?

Hello people of the Rock  Pop section. Hope you're all feeling
SMASHING today. :)

I have actually only just heard of Tangerine Dream today. Some girl
that I work with is getting rid of some records and she said she told
me to listen to Tangerine Dream and if I like them I can have her old
records.
I've never heard any songs by them before. Are they any good?
What songs would you recommend by them?

THANKS. :D