What is the Bowery like these days? What is Williamsburg like?

It’s been over a decade since I lived in NYC, and I’m wondering how various places have changed. Maybe there are people here who can tell me. I remember the Bowery as being this dirty looking, smelly place, with run-down buildings, and a very seedy air.

The same is pretty much true for for my knowledge of Williamsburg. I understand that has changed greatly, with an influx of artists, followed by yuppies. So how does it feel and look now? How does the Bowery feel and look now?