Although I don't live there, I wish people would stop bashing Kreis 4 in ZH; it's really no worse than any other metropolitan area in any other European country and I'd say not bad as a downtown neighbourhood in which to live. Certainly more desirable then downtown UK neighbourhoods. There are many positive factors to living in Kreis 4:
- parks (safe! no needles! Children playing!)
- fantastic appartments in beautiful buildings
- excellent cinemas
- bistros and restaurants
- clubs
- boutiques
- markets
- diversity
- street festivals
- excellent transport links
- inexpensive
- Somehow, a community feel. Shock.
- minutes from the river/main station/anywhere
- need I go on?
Obviously there are undesirable elements such as the drug scene, prostitution etc. but if you live in Zurich I challenge you to tell me those things don't go on in your neighbourhood. Seefeld is a hotbed, albeit somewhat gentrified. Drugs and prostitution are everywhere.
If you're expecting a Suburban environment, Kreis 4 is going to be a shock; to anyone from a city, it's really not bad

If you feel young at heart, you'll die of boredom in Seefeld... unless you're another Yuppie
Try Kreis 4 for six months: you can always 'upgrade' if the environment is too vibrant for you. It's a good introduction to Zürich, and a friendly place to boot!