I had a 620ie for a while, put 6k or so on it. Only problem I had was the brake light switch for the rear brake failed. Other than the lack of wind protection and the crappy suspension it was a really good comfortable bike for running around town. Especially with slightly taller bars. I even sold it for a significant profit. :)
I probably should have kept it, but my irrational vengeful hatred of vw/audi means I can't own anything vaguely related.